''Best thing I''ve read this year'' Will Dean
''Terrifying'' Kiran Millwood Hargrave
''A brilliantly plotted story'' Guardian
''Gripping . . . A twist on The Shining'' New York Times
''Its chilling final twist will have you turning directly back to the first page'' Mail on Sunday

Henry, a brilliant but reclusive engineer, has achieved the crowning discovery of his career: he''s created an artificially intelligent consciousness. He names the half-formed robot William.

But there''s something strange about William.

It''s not that his skin feels like balloon rubber and is the colour of curdled milk, nor is it his thick gurgling laugh or the way his tongue curls towards his crooked top teeth. It is the way he looks at Henry''s wife, Lily.

Henry created William but he is starting to lose control of him. As William''s fixation with Lily grows and threatens to bring harm to their house, Henry has no choice but to destroy William.

But William isn''t gone. Filled with jealousy for humanity, for its capacity to love and create life, William starts to haunt the house.

He lurks behind each locked door. You can hear him muttering in the eaves of the attic. He is whispering in Henry''s head. And he will be the one to take control . . .

Readers are loving William:

''Nothing prepared me for the final twist'' ⭐⭐⭐⭐⭐

''A weird and wonderful book'' ⭐⭐⭐⭐⭐

''Creepy, terrifying and has a killer twist that I did not see coming'' ⭐⭐⭐⭐⭐

''Truly scary and unpredictable! What a brilliant book'' ⭐⭐⭐⭐⭐

''An addictive read'' ⭐⭐⭐⭐⭐