From the author of the critically acclaimed The Imaginary comes a powerful story about friendship in the vein of Roald Dahl and Neil Gaiman. A School Library Journal Best Book of 2017 A Wall Street Journal Best Book of 2017 Frank thought her summer couldn't get any worse—until big, weird, smelly Nick Underbridge rescues her from a bully, and she winds up at his house. Frank quickly realizes there's more to Nick than meets the eye. When she's at his house, she hears the strangest, most beautiful music, music which leads her to a mysterious, hidden door. Beyond the door are amazing creatures that she never even dreamed could be real. For the first time in forever, Frank feels happy . . . and she and Nick start to become friends. But Nick's incredible secrets are also accompanied by great danger. Frank must figure out how to help her new friend, the same way that he has helped her. Acclaimed author A. F. Harrold weaves a powerful story about unlikely friendship, strange magic, and keeping the shadows at bay.