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Caspar Geon

@caspargeon.bsky.social

Author of extragalactic space opera THE IMMEASURABLE HEAVEN, published July 2025 by Solaris. Repped by Ed Wilson Also known as that weirdo Tom Toner, author of the Amaranthine Spectrum https://linktr.ee/caspargeon Preorder: https://geni.us/immeasurable

400 Followers  |  445 Following  |  85 Posts  |  Joined: 21.10.2024  |  2.0889

Latest posts by caspargeon.bsky.social on Bluesky

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Announcing Mortedant's Peril by RJ Barker - Reactor Murder, mystery, and magic arrives May 2026 from Tor Books!

You have NO IDEA how hard it has been keeping quiet about this. So friends, AT LAST, THE NEXT BOOK IS ANNOUNCED!

(I'm usually a bit nervy about new stuff but feel like this one is A BANGER.)

reactormag.com/book-announc...

19.08.2025 13:18 β€” πŸ‘ 169    πŸ” 36    πŸ’¬ 32    πŸ“Œ 8
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The world outside: Non-Stop (1958) by Brian Aldiss A classic showcase of conceptual breakthroughs

Brian Aldiss was born 100 years ago today, on 18 August 1925. Recently, I wrote about his debut SF novel, the generation starship classic Non-Stop (1958).

18.08.2025 21:47 β€” πŸ‘ 19    πŸ” 4    πŸ’¬ 0    πŸ“Œ 0

Reposting for friends across the pond

18.08.2025 16:36 β€” πŸ‘ 1    πŸ” 2    πŸ’¬ 0    πŸ“Œ 0
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The Immeasurable Heaven has been out one month today, and I wanted to say a huge thank you for the support & love my weird tale from another galaxy has had so far.

@solarisbooks.bsky.social
@locusmag.bsky.social
@aptshadow.bsky.social
@nerdsofafeather.bsky.social
@frasierarmitage.bsky.social

18.08.2025 10:27 β€” πŸ‘ 4    πŸ” 1    πŸ’¬ 0    πŸ“Œ 1
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An Evening With Sam K. Horton At Waterstones Truro - In Conversation With Ronnie Turner | Events at Waterstones Bookshops | Waterstones Events at Waterstones get you closer to the books and authors you admire most. Find information and tickets about An Evening With Sam K. Horton At Waterstones Truro - In Conversation With Ronnie…

On 14th October, join @samkhorton.bsky.social at Truro Waterstones in conversation with @ronnieturner8702.bsky.social to celebrate the much-anticipated launch of RAGWORT, sequel to deliciously dark historical fantasy GORSE!

Tickets available now:

16.08.2025 12:01 β€” πŸ‘ 6    πŸ” 3    πŸ’¬ 0    πŸ“Œ 0
Against a gold background, white text "Aurora Award for Best Novel - Winner!". Below, the paperback cover for THE SIEGE OF BURNING GRASS by Premee Mohamed. The white Solaris logo is in the bottom right corner.

Against a gold background, white text "Aurora Award for Best Novel - Winner!". Below, the paperback cover for THE SIEGE OF BURNING GRASS by Premee Mohamed. The white Solaris logo is in the bottom right corner.

Congratulations to the fabulous (and MULTI award-winning) @premeemohamed.com: THE SIEGE OF BURNING GRASS has won the Aurora Award for Best Novel!

(And well done to Premee again, for winning Best Novella whilst wearing a different publishing hat!)

geni.us/siegeburning...

16.08.2025 16:02 β€” πŸ‘ 177    πŸ” 44    πŸ’¬ 4    πŸ“Œ 3
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Another fun Extreme Wildcard Worldbuilding Workshop last night with the @rookeryp.bsky.social , taught from my boiling hot spare room. Some good notes, including β€˜space sepsis’, β€˜accidentally horny’, and (my personal favourite) β€˜what happens if it farts’.

17.08.2025 09:17 β€” πŸ‘ 3    πŸ” 1    πŸ’¬ 0    πŸ“Œ 0
Brush water that looks like tea

Brush water that looks like tea

This is the most dangerous shade your brush water can be.

16.08.2025 14:48 β€” πŸ‘ 2755    πŸ” 480    πŸ’¬ 99    πŸ“Œ 44

Thanks for having me guys, always fun to chat and your group came up with some great stuff!

17.08.2025 09:05 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

This was a hoot! @tomtoner.bsky.social was great as always and the chat brought tons of brilliant ideas to bear. It's available to watch now, check it out. We're planning a part two, and I'm also thinking about how to adapt it for school...

16.08.2025 22:54 β€” πŸ‘ 4    πŸ” 2    πŸ’¬ 1    πŸ“Œ 0
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Extreme Wildcard Worldbuilding Workshop, with Tom Toner (ItR Special Episode 10:2) Join us Inside the Rookery with for a special worldbuilding workshop with author Tom Toner. For more on his most recent book, check here: https://www.simonandschuster.co.uk/books/The-Immeasurable-Hea...

Today's interactive world building workshop with @tomtoner.bsky.social will be wildly imaginative and loads of fun!

7pm UK / 2pm ET / 11am PT

youtube.com/live/Vrc8zEf...

2/5

16.08.2025 11:51 β€” πŸ‘ 4    πŸ” 2    πŸ’¬ 1    πŸ“Œ 4

I had to click on the link again and check I hadn’t misread that - would be a bit embarrassing

15.08.2025 10:39 β€” πŸ‘ 3    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
A selection of endorsements for THE NEEDFIRE by MK Hardy, surrounding the book cover with the white Solaris logo in the bottom left corner.

A selection of endorsements for THE NEEDFIRE by MK Hardy, surrounding the book cover with the white Solaris logo in the bottom left corner.

πŸ³οΈβ€πŸŒˆ πŸ”₯ THE NEEDFIRE is aflame!

@mkhardywrites.com 's Scottish Sapphic gothic is roaring onto bookshelves!

Here's what @sunyidean.com @natania.bsky.social @aliettedebodard.com @rainewilson.bsky.social and more wonderful authors think of the book!

Buy now geni.us/needfire

15.08.2025 10:03 β€” πŸ‘ 17    πŸ” 7    πŸ’¬ 0    πŸ“Œ 0
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The Immeasurable Heaven by Caspar Geon: Review by Paul Di Filippo The Immeasurable Heaven, Caspar Geon (Solaris 978-1837864737, trade paperback, 352pp, $16.99) July 2025. Identity is multiplex and enigmatic. We witness an example of this maxim with the book curre…

Very nice review for Immeasurable Heaven just in from the excellent folks at @locusmag.bsky.social

β€œA wordsmith without peer… startling, unpredictable and croggling freshness of imagery and action.”

@solarisbooks.bsky.social
locusmag.com/2025/08/the-...

15.08.2025 10:19 β€” πŸ‘ 7    πŸ” 5    πŸ’¬ 1    πŸ“Œ 0
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Two very different novels on the go, notebooks piling up, eyelid twitching, shoulder blades buggered, neck strained, fingers spasming, brain fried - still my favourite thing to do

14.08.2025 11:27 β€” πŸ‘ 2    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
Against a blue fabric background dotted with stars, a flatlaid copy of STARSTRIKE by Yoon Ha Lee. The white Solaris logo is in the bottom left corner.

Against a blue fabric background dotted with stars, a flatlaid copy of STARSTRIKE by Yoon Ha Lee. The white Solaris logo is in the bottom left corner.

πŸŽ‰ πŸŽ‚ Happy UK Book Birthday to STARSTRIKE - the sequel to Yoon Ha Lee's Locus award-winning and multi award-nominated MOONSTORM!

Discover the LANCERS series, a tale of empire, mecha-robots, survival and family.

Buy STARSTRIKE (Book 2): geni.us/starstrike
Buy MOONSTORM (Book 1): geni.us/moonstorm

14.08.2025 10:02 β€” πŸ‘ 7    πŸ” 5    πŸ’¬ 0    πŸ“Œ 0
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My son found a moldy Louis Theroux mask underneath his floorboards. He gently put it back for future generations to discover. I hope this isn't a talisman for some kind of curse on his student digs.

13.08.2025 13:49 β€” πŸ‘ 159    πŸ” 20    πŸ’¬ 8    πŸ“Œ 0
A copy of THE IMMEASURABLE HEAVEN by Caspar Geon held up in front of a California Lilac bush. The white Solaris logo is in the bottom left corner.

A copy of THE IMMEASURABLE HEAVEN by Caspar Geon held up in front of a California Lilac bush. The white Solaris logo is in the bottom left corner.

The race for reality has begun in @caspargeon.bsky.social's THE IMMEASURABLE HEAVEN!

"Fans of Ian M. Banks should run not walk to pick up this groundbreaking, headlong rush through realities, space and time." @catrionaward.bsky.social

Buy now: geni.us/immeasurable

13.08.2025 13:30 β€” πŸ‘ 10    πŸ” 2    πŸ’¬ 0    πŸ“Œ 0
From the Sunday Times bestselling author of The Book Eaters comes a dark fantasy set in a historical Hong Kong that combines ancient myths and local legends into a haunting story of ghosts, grief, and women who will not forgive.



When Mercy Chan washed up on the shores of Hong Kong with no family, no money, and no memories, she was thrust into the horrors of World War II. She survived by hiding in Kowloon Walled City, an infamous, ghost-infested slum full of lost and traumatised civilians. Since the end of the war, she has rebuilt her life and found work with the local triad as a ghost-talker, dealing with the angry and bitter spirits who haunt this place. These days, the alleyways of Kowloon feel like home.


But the past she can’t remember won’t let her go. An unusually powerful ghost has infested Kowloon’s waterways, drowning innocents and threatening the district. Unnervingly, it claims to know Mercyβ€”and her forgotten childhood. As Mercy is drawn into a deadly cat-and-mouse game with this malignant spirit, she begins to realize that the monster she fights within these walls may well be one of her own making.


Thirty-three years before, mere days ahead of the Japanese invasion, Sung Siu Yin and her mother flee Hong Kong, intending to hide out on her mother's ancestral island home. It’s beautiful, tranquil, and remote… but also inhabited by ghosts ever since the entire village drowned in a storm many years ago. Still, it’s better than living under occupation.


But as the war drags on and isolation sets in, Siu Yin is increasingly drawn into the island's grim pastβ€”a past that may still have a hold on the present. There is a darkness lurking beneath that idyllic ocean, and it has been waiting many years for someone to return.

From the Sunday Times bestselling author of The Book Eaters comes a dark fantasy set in a historical Hong Kong that combines ancient myths and local legends into a haunting story of ghosts, grief, and women who will not forgive. When Mercy Chan washed up on the shores of Hong Kong with no family, no money, and no memories, she was thrust into the horrors of World War II. She survived by hiding in Kowloon Walled City, an infamous, ghost-infested slum full of lost and traumatised civilians. Since the end of the war, she has rebuilt her life and found work with the local triad as a ghost-talker, dealing with the angry and bitter spirits who haunt this place. These days, the alleyways of Kowloon feel like home. But the past she can’t remember won’t let her go. An unusually powerful ghost has infested Kowloon’s waterways, drowning innocents and threatening the district. Unnervingly, it claims to know Mercyβ€”and her forgotten childhood. As Mercy is drawn into a deadly cat-and-mouse game with this malignant spirit, she begins to realize that the monster she fights within these walls may well be one of her own making. Thirty-three years before, mere days ahead of the Japanese invasion, Sung Siu Yin and her mother flee Hong Kong, intending to hide out on her mother's ancestral island home. It’s beautiful, tranquil, and remote… but also inhabited by ghosts ever since the entire village drowned in a storm many years ago. Still, it’s better than living under occupation. But as the war drags on and isolation sets in, Siu Yin is increasingly drawn into the island's grim pastβ€”a past that may still have a hold on the present. There is a darkness lurking beneath that idyllic ocean, and it has been waiting many years for someone to return.

I will never get tired of that β€œcover to be revealed” graphic, it’s unreasonably exciting and mysterious.

UK reviewers, if you’d love an arc, please reach out! Priority for physical and audio will be given to folks who have accessibility needs for certain formats ❀️

#advancedreadingcopy

12.08.2025 13:42 β€” πŸ‘ 78    πŸ” 20    πŸ’¬ 10    πŸ“Œ 2
A flatlaid hardback copy of THE HUNGRY GODS by Adrian Tchaikovsky against a rusty metal background. The white Solaris logo is in the bottom right corner.

A flatlaid hardback copy of THE HUNGRY GODS by Adrian Tchaikovsky against a rusty metal background. The white Solaris logo is in the bottom right corner.

πŸŽ‰ πŸŽ‚ Happy Book Birthday to the latest instalment in @aptshadow.bsky.social 's TERRIBLE WORLDS novellas - THE HUNGRY GODS!

The Gods have returned to the world... If you want to see tomorrow, you run.

Out in the US today and the UK on Thursday.

Buy: geni.us/HungryGods

12.08.2025 19:30 β€” πŸ‘ 39    πŸ” 9    πŸ’¬ 0    πŸ“Œ 2
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Extreme Wildcard Worldbuilding Workshop, with Tom Toner (ItR Special Episode 10:2) YouTube video by Rookery Publications

Ca-caw! This Saturday's #InsideTheRookery is something a little different! We're doing EXTREME WILDCARD WORLDBUILDING live with @tomtoner.bsky.social!

Tom's also promoting his new book, the wildly imaginative 'The Immeasurable Heaven' (written as Caspar Geon). Join us!
youtube.com/live/Vrc8zEf...

12.08.2025 15:48 β€” πŸ‘ 6    πŸ” 3    πŸ’¬ 1    πŸ“Œ 0
Join me at the team at the Rookery on Saturday for my extreme wildcard Worldbuilding workshop

Join me at the team at the Rookery on Saturday for my extreme wildcard Worldbuilding workshop

Looking forward to teaching my Extreme Wildcard Worldbuilding Workshop (EWWW) with the lovely folk at @rookeryp.bsky.social on Saturday. We’ll be doing exoplanet ecosystems and cultures, and I am duty bound to write down everything that gets shouted at me, so pop along!

@solarisbooks.bsky.social

13.08.2025 10:57 β€” πŸ‘ 7    πŸ” 3    πŸ’¬ 0    πŸ“Œ 0

Please forgive me for one last share, before I go back to talking all things books, sports, doggos and yarny goodness, which is by far my preference ❀️ Thank you beyond words for every share and donation thus far - you've helped me feel safer in being able to apply as soon as we find a place.

07.08.2025 07:55 β€” πŸ‘ 15    πŸ” 18    πŸ’¬ 0    πŸ“Œ 0

Thank you so much @oliverklangmead.bsky.social!

12.08.2025 13:49 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
An email from one Kiley Gooch.

An email from one Kiley Gooch.

The spam folder is a treasure trove of Star Wars character names

11.08.2025 13:43 β€” πŸ‘ 80    πŸ” 9    πŸ’¬ 4    πŸ“Œ 0
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Review: For The Road by Stark Holborn | FanFiAddict Synopsis In the desert is a railroad track made from iron and bone, and on the track is a station where the signal is broken and the train never comes…&nbsp ...

With FOR THE ROAD, @starkholborn.bsky.social β€œproves yet again why she’s the reigning queen of the weird west.Β She’s deliveredΒ a fast-paced fever-dream of an acid western, bristling with tension and brimming with intrigue.”

Full review πŸ‘‡πŸ»Β 

fanfiaddict.com/review-for-t...

10.08.2025 11:46 β€” πŸ‘ 15    πŸ” 10    πŸ’¬ 0    πŸ“Œ 0

Can you spare a dollar to help this writer kick cancer's ass?

09.08.2025 21:31 β€” πŸ‘ 64    πŸ” 58    πŸ’¬ 2    πŸ“Œ 0
β€œFans of Iain M Banks should run not walk to pick up this groundbreaking, headlong rush through realities, space and time. It’s been some time since a book involved my mind as much as it did my heart.” Catriona Ward

β€œFans of Iain M Banks should run not walk to pick up this groundbreaking, headlong rush through realities, space and time. It’s been some time since a book involved my mind as much as it did my heart.” Catriona Ward

Really lovely quote in from @catrionaward.bsky.social for Immeasurable Heaven

@solarisbooks.bsky.social
#bookskyπŸ“šπŸͺπŸ’™

07.08.2025 09:16 β€” πŸ‘ 23    πŸ” 6    πŸ’¬ 1    πŸ“Œ 0
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Back mid July, Pegah and I took a trip through to Bath to support the launch of The Immeasurable Heaven by our friend @caspargeon.bsky.social (i.e. Tom Toner).

Go support Caspar by grabbing a copy right now!!

#booksky #authorfriends #bookish

05.08.2025 20:07 β€” πŸ‘ 7    πŸ” 2    πŸ’¬ 1    πŸ“Œ 0

Hello! Good to be back (until I have to inevitably go away again)

03.08.2025 11:11 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

@caspargeon is following 20 prominent accounts