Reproduction (Hypothesis Series #8)

Reproduction (Hypothesis Series #8) by Penny Reid is out now since October 16, 2025.

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Reproduction (Hypothesis Series #8) Release Date: October 16, 2025

Published

Sam keeps sleepwalking . . . and waking up in the wrong bed.

Samantha Jarlston keeps telling herself she doesn’t want to get romantically involved with her former childhood best friend and current partner in crime, the very sexy chess grandmaster, Andreas Kristiansen. But despite her many, many, MANY protestations, Sam keeps waking up in Andreas’s bed. Even worse, he’s adorably flustered and shy about it. Every. Single. Time.

Sleepwalking into Andreas’s bedroom and his cute reactions aren’t complications Sam has time for, not when she needs to get back on track with her Ph.D., catch up with her part-time job while avoiding the inappropriate Dr. James Nieminen, not to mention juggling the demands of exacting revenge on the Kristiansens.

Basically, her social calendar is quite full.

Does her subconscious know something her conscious brain does not? Is Sam ready to give up on revenge once and for all and figure out how to make things work with her first love?

And what happens when Sam finally discovers adorable Andreas’s dirty little secret?

‘REPRODUCTION’ is book 2 in the ‘Fundamentals of Biology’ trilogy, ends on a cliffhanger, and cannot be read as a standalone. ‘Fundamentals of Biology’ is the third trilogy in a series of trilogies that begins with ‘Elements of Chemistry’ and ‘Laws of Physics.’ You do NOT need to read ‘Elements of Chemistry’ or ‘Laws of Physics’ before reading ‘Fundamentals of Biology.’

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Genre: Romance

Penny Reid

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