Patrick Ness is the New York Times best-selling author of A Monster Calls (inspired by an idea from Siobhan Dowd), which won both the Carnegie Medal and the Kate Greenaway Medal, was a Los Angeles Times Book Prize Finalist, and was made into a major motion picture for which he wrote the screenplay. He is also the author of the critically acclaimed and best-selling Chaos Walking trilogy, More Than This, Release, Different for Boys, The Rest of Us Just Live Here, and Burn. His many accolades include two Carnegie Medals, an Olivier Award, the Guardian Children's Fiction Prize, the Book Trust Teenage Prize, and the Costa Children's Book Award. Patrick Ness lives in Los Angeles.

Tim Miller is the author-illustrator of Moo Moo in a Tutu, What's Cooking, Moo Moo?, Tiny Kitty, Big City, and Izzy Paints. He is also the illustrator of Horse Meets Dog by Elliott Kalan, Snappsy the Alligator (Did Not Ask to Be in This Book) and Snappsy the Alligator And His Best Friend Forever! (Probably) by Julie Falatko, Margarash by Mark Riddle, and the middle-grade series Hamstersaurus Rex by Tom O'Donnell. He lives in New Jersey with his wife and three rescue cats.