Dark secrets are revealed and new neighbors aren’t who they appear to be in this psychological thriller from a #1 bestselling author—perfect for fans of The Girl on the Train and Gone Girl .   The woman who answers the door tells a convincing story. She’s the house-sitter. Just here for a month. An old friend of Cady’s who needed a place to stay. She’s pleasant and warm, and Maggie wanders back to her house thinking she might have made a new friend.   But when Sarah closes the door she knows she must do something about Maggie. She didn’t want anyone to know she’s living at 214 Palmer Street. She doesn’t want anyone to know her name, to find out about her husband, or how she really knows Cady.   And she definitely doesn’t want anybody walking into the house…