Julia DeVillers is the USA TODAY bestselling and award-winning author of How My Private, Personal Journal Became a Bestseller, which was adapted as a Disney Channel Original Movie called Read It and Weep. She is also the author of Meet Me at Wonderlandand the Liberty Porter, First Daughter series, among others, and the co-author—with her twin sister, Jennifer Roy—of the Trading Faces series and the Isabel and Nicki American Girl books. Visit her at JuliaDeVillers.com.

Jennifer Roy is the author of the highly acclaimed Yellow Star, which won a Boston Globe–Horn Book Award Honor for Excellence in Children’s Literature; Mindblind; Jars of Hope; and Playing Atari with Saddam Hussein and is the coauthor of Meet Isabel and Nicki—an American Girl book featuring the series’ first twins—and the Trading Faces series with her twin sister, Julia DeVillers.