Sarah Mlynowski is the New York Times bestselling author of the Whatever After series, the Magic in Manhattan series, Best Wishes, Gimme a Call, and a bunch of other books for teens and tweens, including the Upside-Down Magic series, which she cowrites with Lauren Myracle and Emily Jenkins and which...

Sarah Mlynowski is the New York Times bestselling author of the Whatever After series, the Magic in Manhattan series, Best Wishes, Gimme a Call, and a bunch of other books for teens and tweens, including the Upside-Down Magic series, which she cowrites with Lauren Myracle and Emily Jenkins and which was adapted into a movie for the Disney Channel. Originally from Montreal, Sarah now lives in Los Angeles with her family. Visit Sarah online at sarahm.com and find her on Instagram, Facebook, and Twitter at @sarahmlynowski.

Debbie Rigaud is the coauthor of Alyssa Milano's New York Times bestselling Hope series and the author of Simone Breaks All the Rules and Truly Madly Royally. She grew up in East Orange, New Jersey, and started her career writing for entertainment and teen magazines. She now lives with her husband and children in Columbus, Ohio. Find out more at debbierigaud.com.