Meet M: she works in publishing and enjoys watching people. She suffers from memory lapses and has established an unhealthy relationship with Caleb across the street. Caleb doesn't know M exists... But when M starts to practice memory-recall exercises—to learn the truth about past behaviors—it sheds light on this fascination with the man across the street. Is M dangerous or just disturbed? And is Caleb about to find out? This gripping psychological thriller is perfect for fans of S.E. Lynes, Shalini Boland, and Samantha Hayes.