Jason Segel is an actor and a writer. Segel wrote and starred in Forgetting Sarah Marshall and cowrote 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, among others. 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. OtherEarth is his second novel for young adults. To learn more about him, you can follow @jasonsegel on Twitter.

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. OtherEarth is the sixth novel Kirsten has written with Jason Segel. You can visit Kirsten at kirstenmillerbooks.com or follow @bankstirregular on Twitter.