Jason Segel is an actor, a writer, and an author. Segel wrote and starred in Forgetting Sarah Marshall and co-wrote Disney’s The Muppets, which won an Academy Award for Best Original Song. Segel’s film credits include The End of the Tour; I Love You, Man; Jeff Who Lives at Home; Knocked Up; and The Five-Year Engagement. On television, Segel starred on How I Met Your Mother as well as Freaks and Geeks. He is the coauthor of the New York Times bestselling Nightmares! series—Nightmares!; Nightmares! The Sleepwalker Tonic; Nightmares! The Lost Lullaby; and Everything You Need to Know About NIGHTMARES! and How to Defeat Them. Otherworld is his first novel for young adults.
Kirsten Miller lives and writes in New York City. She is the author of the acclaimed Kiki Strike books, the New York Times bestseller The Eternal Ones, and How to Lead a Life of Crime. Otherworld is the fifth novel Kirsten has written with Jason Segel.