Lisa Scottoline, internationally bestselling author of KEEP QUIET, returns with EVERY FIFTEEN MINUTES, a thriller that will captivate fans of DAUGHTER and THE SISTERS. 'Scottoline is a powerhouse' David Baldacci Psychologist Dr Eric Parrish is unwittingly under threat. Recently separated from his wife, Eric is learning to become a single parent to his seven-year-old daughter, and life is far from straightforward. Now Eric has a new patient who could be a severe danger to others. And he must make a decision that will leave deadly consequences in its wake. The clock is ticking, and someone is hell bent on destroying Eric's practice, his family, his life. But how can you defend yourself against an enemy you don't know? And can you ever win a game you don't even know you are playing?