If you loved Behind Her Eyes, prepare to be totally and utterly blown away by Insomnia. Sarah Pinborough is a twisted genius.--Lisa Jewell

IN THE DEAD OF NIGHT, MADNESS LIES ...

Emma can't sleep.

CHECK THE WINDOWS.

It's been like this since her big 4-0 started getting closer.

LOCK THE DOORS.

Her mother stopped sleeping just before her own fortieth birthday.

She went mad and did the unthinkable because of it.

LOOK IN ON THE CHILDREN.

Is that what's happening to Emma?

WHY CAN'T SHE SLEEP?

Insomnia is the twistiest and most gripping thriller since Paula Hawkins's The Girl on the Train, an absolute must-read for suspense fans.--Joe Hill