*The Sunday Times bestseller*

'Smart, sassy and totally on point.' SARAH PINBOROUGH, BESTSELLING AUTHOR OF BEHIND HER EYES

'Fast-paced and full of excitement...It kept me gripped.'
KATERINA DIAMOND, AUTHOR OF THE TEACHER

YOU HAVE SIX SECONDS TO READ THIS MESSAGE...

The body of a 15-year-old is found hours after she sends a desperate message to her friends. It looks like suicide, until a second girl disappears.

This time, the message is sent directly to the Metropolitan Police - and an officer's younger sister is missing.

DS Nasreen Cudmore and journalist Freddie Venton will stop at nothing to find her. But whoever's behind the notes is playing a deadly game of hide and seek - and the clock is ticking.

YOU HAVE 24 HOURS TO SAVE THE GIRL'S LIFE.
MAKE THEM COUNT.

'Creepy, clever and unnerving,' C. L. Taylor'
'Heart-pounding suspense...' Sharon Bolton