The Clavius crater on the Moon at night beneath a dense starfield

A novel by Madeira Desouza

ClaviusDeep

Book 1 (Clavius Deep) from Madeira Desouza's Clavius Harvest Series of novels.

A queer science-fiction thriller with a cosmic-horror premise.

Far beneath the floor of Crater Clavius on the Moon, a top-secret directorate sends young men in time machines to the past and the future on Earth. The purpose of time travel is to change history to prevent the self-destruction of the planetary civilization.

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Cover of the novel Clavius Deep by Madeira Desouza

The premise

The Colossus: an ancient extraterrestrial structure buried beneath Crater Clavius

An ancient, invisible extraterrestrial civilization develops an addiction to human male ecstasy--a crucial biological energy resource. To safeguard this priceless resource for themselves, the extraterrestrials enslave human men to secretly siphon off emotional and physical pleasures. This explodes into a war between extraterrestrials and humans spanning centuries. The outcome of this war will determine whether humans remain the dominant species on planet Earth.

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Three young time-travel agents in dark uniforms inside a lunar base corridor

Time-Travel Agents

Many young men plus twenty time machines in a lunar base. All top-secret. These agents struggle with the mental and physical risks of travel in time. And nobody is prepared for the irreversible impacts which time travel has upon the human body.

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Reader responses

What readers are saying

All reviews
“This was one of those rare science fiction novels that wasn't afraid to be ambitious. It blends first contact, time travel, conspiracy and philosophical questions into a story that kept you wondering what was coming next. Instead of relying on the normal alien storyline, it went a different way with way they might be obsessed with human emotion. It tied it to a larger conflict over time itself. It felt fresh and unpredictable.”
July 22, 2026 — Four stars — Amazon
“It hooked me from the first paragraph. Truly. I love the writing style, the way it just drags me into the story. And if there's something that doesn't particularly make sense right away, that's okay because it explains it pretty quickly. I didn't feel it was smutty for the sake of being smutty. It was purposeful and the storyline was driven forward. All in all, a great short read, and I'll likely reread it again.”
July 16, 2026 — Five stars — Amazon
“This book is an absolutely wild ride! These aren't aliens in a traditional sense at all! This was a very interesting take on aliens that provided a refreshing perspective on LGBT culture in a way that was not flashy and over the top, but simply they just were. Aliens in space feeding off of human ecstasy is a wild take, and its gay!”
May 27, 2026 — Three stars — Amazon

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Clavius Deep by Madeira Desouza shown in ebook, paperback and hardcover editions

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