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