Subject Twenty-One - Tomorrow's Ancestors (Paperback)

A stonking good sci-fi & coming-of-age story all wrapped into one . . . a book that tackles humanity, hardship, and classism at the deepest level. - Magic Radio Book Club

An unputdownable exploration into the ethics of science - Buzz Magazine

A laudable debut with a sustained narrative and characterisations that demand the reader keep on their toes. - NB Magazine

Incredible . . . without a doubt one of the best YA sci-fi books I've ever read. - Out and About Books

An unexpectedly wonderful read. Unique and engaging with full Jurassic vibes to boot. - Fictional Maiden

[An] amazing debut sci-fi novel . . . I'd recommend everyone to read if you want a unique and fresh dystopian storyline - Darkling Reads

Instantly engaging . . . widens out from a tale of a girl trying to find her own identity to a broader story encompassing an entire population's burden of oppression, and the desire for freedom - Track of Words

This is one of the rare debuts that are really five star reads. Subject Twenty One grabbed me instantly and I couldn't put it down - DOMREADS

This book quickly made its way into my heart as the first book that included sign language throughout . . .I was honestly could have continued to read it indefinitely, such is the excellent craftsmanship of the story and the pull in the emotions. - Lauren Sparks

A thought-provoking and enjoyable read with intriguing premises and an original setting. - Future Fire Reviews

A fascinating read - Cheryl M-M's Book Blog

An interesting story, wonderfully written. - Jera's Jamboree

Well-thought out and fun to read. - Rosie Writes

A well-told story, incorporating some particularly interesting ideas. - Popular Science

Warren's ideas in this book are wonderful, playing on the current ambivalence about genetic engineering and envisaging a world in which it's the basis of a whole new caste system. - The Idle Woman

A unique and intriguing narrative in a believable dystopia. - Feed Me Fiction

Incredibly well-written...would happily recommend it to everyone. - Blam Books

Full of clever imaginings that make a thought provoking read . . . I found myself completely gripped by the story and fully immersed in its eerily atmospheric world. - BookClubForMe

Really interesting and thought provoking . . . explores the idea of what it is to be human, and whether we can live alongside each other without feeling the need to be "better" than anyone else - RamblingMads

I really loved Subject Twenty One . . . I just couldn't stop reading. This book made me cry, made me laugh, and made me think about my own life. - Nerdy Book Dragon

A treat for nerds [with] a focus on genetic engineering and reversing extinction - Sifa Elizabeth Reads

Absolutely fascinating! If you're a fan of Jurassic Park, Tahereh Mafi & Marie Lu's work, then this is the perfect book for you! - A Bookish Star

I really liked this book. Right from the start the story drew me in . . . I can't wait for the next book - Mugful of Books

So enjoyable and a super fast read . . . Made me feel proud of being a STEM girl . . . Go read this book for the adventure and discovery! - REBIREADS

Now THIS is a book I really enjoyed . . . covers some really great themes that are both topical and interesting. Social psychology, anthropology, paleontology, bias, racism, ethics - it's got it all! - Horner's Book Corner

Fascinating . . . has twists & turns & even broke my heart into tiny little pieces. I'd recommend this to fans of the Hunger Games, Maze Runner & Ready Player One. - BOOKIEMAMABEAR

This Jurassic Park-esque concept grabbed me immediately . . . a fresh, gripping read with themes of suspense, trust, ethics and friendships - Book Phenomena

I absolutely devoured this book . . . Warren did a perfect job of pulling me in and answering some of my questions, but leaving enough of it unanswered so that I want more . . . and I definitely do! I can't wait for the next instalment! - Elle Reads Books