Emily Chenoweth is the author of Hello Goodbye and the ghostwriter of several young adult New York Times Bestsellers. Under the name Emily Raymond, she has co-authored eight books with James Patterson, including First Love, Expelled, and Witch & Wizard: The Lost. She lives in Portland, Oregon, with her partner, the writer Jon Raymond, and their two daughters.

Robb Mommaerts is an illustrator living and working in the frigid state of Wisconsin. He hasn't changed much from his childhood years in the fact that he still mostly loves drawing monsters, dinosaurs, and robots. From his basement dungeon, he works primarily in the world of game art, children's books, character design, and comics.

When not attempting to put the strange daydreams from his head to paper, he and his wife are trying to keep up with two kids and a dog.