Someone is obsessed with Mia Hawkins.

She's felt their gaze on the back of her neck.

She's heard their footsteps, walking home in the dark.

She's glimpsed a shadowy figure and the flash of a camera.

Mia doesn't know Jade. But Jade knows everything about Mia. In fact, she's turned herself into Mia's doppelganger, from her long brown hair to the minute details of her outfits. She's so convincing that when Jade's body is found by the cliffs, everyone believes it's Mia. But Mia can't work out why anyone would imitate her - or why they'd end up dead. As life as she knows it is decimated, she is left with no idea who to trust . . . or if she will be the next one to die.

Gina Blaxill lives in North London. She wanted to be an author from a very young age - she started writing properly when she was eight and has not stopped since.

• Dimensions ‏ : ‎ 17.2 x 2.6 x 18.2 cm