• "Matt Haig is astounding"

    Stephen Fry
  • "A highly original page-turner"

    Independent on Sunday
  • "A brilliant story that you'll want to read in one sitting"

    The Sun on Sunday
  • "An exciting SF thriller but also a rich and deeply felt exploration of the line that separates humans – creatures of love, passion, fear and hate – from mere organic simulations"

    Anthony McGowan, Guardian
  • "It’s a treat to read such a satisfying, complex work"

    Financial Times