Michael Teitelbaum is the author of The Very Hungry Zombie, The Very Thirsty Vampire, and hundreds of other children's books including young adult and middle grade novels, tie-in novelizations, and picture books based on characters, movies, and TV shows as varied as Spider-Man, Superman, Avatar, Teenage Mutant Ninja Turtles, Smallville, X-Men, Batman, Transformers, Garfield, and Kermit the Frog. His books include the sports series Backyard Sports, Weird Sports, Jackie Robinson: Champion for Equality, and The Scary States of America. He lives in Hobart, New York.

Loren Long is the author and illustrator of the New York Times bestselling Otis series.

He's also the illustrator of the #1 New York Times bestseller Of Thee I Sing by Barack Obama, as well as the re-illustrated, #1 New York Times bestseller The Little Engine That Could by Watty Piper.

He lives near Cincinnati with his wife, two sons, and two Weimaraners.