'Rex, a 2-metre-tall bioengineered dog, is one of the most achingly human characters I have ever encountered in an SF novel. A gripping dive into bioethics and artificial intelligence' New Scientist

'This is superior stuff, tackling big themes – gods, messiahs, artificial intelligence, alienness – with brio' Financial Times

'A joy from start to finish. Entertaining, smart, surprising and unexpectedly human' Patrick Ness

'The novel [is] thoughtful and emotionally affecting, yet also exciting and unpredictable' SFX 5* review

'A timely warning about the dangers of artificial intelligence and super weapons in the hands of unscrupulous powers' Guardian

Tchaikovsky is a phenomenal author, a modern powerhouse of fiction... Speculative fiction at its best' Starburst

A novel which takes war and broadens the concept to include peacetime ramifications of this new frontier technology through sociopolitical commentary which in turn gives the characters and theme a 360 feel delivered through a multi POV narrative... This book is great, read it' Just a Guy Who Likes to Read

The nuance of the story could easily have been lost in imagery of massive animals running impossible missions, but Tchaikovsky is a skilled navigator and guides us deftly along to a very satisfying conclusion... The work of an author on the very top of his game' Boney Abroad

A chilling portrayal of the future, humanised, ironically, by the lovability of the primary character, Rex... Tchaikovsky demonstrates, yet again, that he is an excellent storyteller whether in fantasy of science fiction' Concatenation

A pretty stellar work of speculative fiction... I promise you'll never see dogs in the same way again' The Roaring Bookworm