From the New York Times bestselling author of Hidden Pictures and The Last One at the Wedding comes a new supernatural thriller about a young woman pet-sitting a cat with a mysterious secret, featuring more than eighty pages of illustrations. Meet Penny Padgett, a twenty-seven-year-old cartoonist in Philadelphia who agrees to pet-sit a very peculiar cat named Godfrey in her home. At first, he’s a warm and affectionate companion who follows Penny all around the house and insists on sleeping by her side every night. But soon strange things are happening: Penny is haunted by disturbing and violent nightmares. There’s a terrible insect infestation in her basement. Her cute cartoon illustrations turn dark and surreal, as if influenced by some invisible hand. And her health starts failing, as if her mind and body are under attack by a sinister, malevolent force. Penny may be a cat person, but she’s starting to think Godfrey is no ordinary cat. . . . Fully illustrated with more than eighty pages of original artwork, Jason Rekulak’s new novel is intensely plotted, wonderfully frightening, and wildly clever. He more than lives up to his reputation as having “a freakishly fertile imagination” (The New York Times ).