THE AUTHOR WITH MORE THAN 3.5 MILLION BOOKS SOLD WORLDWIDE! I wake with dirt under my nails and no memory of how it got there. There are texts on my phone I don't remember sending. A body at the lake. And a voice in the dark whispering: "You can rest now. It's done." Three months earlier, I moved to Portland to start a new life with a new job after my divorce. Then I met Emma. She brought me coffee without being asked, saved my job before I knew it was in danger, and showed up at my door with soup when I was too sick to stand. She knew my coffee order, my sister's name, my Sunday routines-things I was sure I'd mentioned. I hadn't. She knew them before we ever met. When I tried to pull away, she didn't let go. She told my boss I was breaking down and my coworkers that she was scared for me. Someone close to me started feeding her my secrets. Things in my apartment moved in the night. And every time I tried to tell someone what was happening to me, they looked at me the way you look at someone who's lost their mind. Because Emma doesn't threaten you. She doesn't stalk you. She befriends you. She makes you need her. And then she makes everyone you love believe you're the problem-while she stands right beside you, looking like the only person who cares. There were others before me. One ran to another city. She still sleeps with the lights on. But how Emma found me? How she chose me? That's the part that changes everything. That's the part where you'll lose your mind. From #1 international bestselling author Christopher Smith comes an unputdownable thriller about a friendship that was never a friendship at all. For fans of Freida McFadden, Riley Sager, and Lisa Jewell.