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 X at @sarahmlynowski.
Christina Soontornvat is a three-time Newbery Honoree, a Sibert Honoree, and a Kirkus Prize winner. Her highly acclaimed backlist includes the middle grade books The Tryout, The Last Mapmaker, A Wish in the Dark, and All Thirteen; the picture book To Change a Planet; and the chapter book series Diary of an Ice Princess and Legends of Lotus Island. Christina lives in Austin, Texas, with her family. You can learn more about her work at soontornvat.com.