Ilene Cooper is an award-winning author of over thirty books for children, including picture books, middle-grade fiction, and young adult non-fiction. A longtime children's book review editor at Booklist magazine, her acclaimed titles include Jewish Holidays All Year Round , A Woman in the House (and Senate) , and the bestselling picture book The Golden Rule . She lives in Highland Park, Illinois. Gabi Swiatkowska is an Ezra Jack Keats Award-winning illustrator, fine artist, and musician. Born in Poland, she studied fine art at the Cooper Union School of Art in New York City. Her distinctive, luminous illustrations have earned numerous accolades, including a New York Times Best Illustrated Children's Book designation for Infinity and Me and an ALA Notable Book selection for My Name Is Yoon . She currently lives and creates in the south of France. John Green is the #1 New York Times bestselling author of The Fault in Our Stars , Looking for Alaska , Paper Towns , and Turtles All the Way Down .

A recipient of the Michael L. Printz Award and an Edgar Award, his books have been published in dozens of languages and adapted into major feature films and series. Together with his brother Hank, he is the co-creator of popular educational video projects, including CrashCourse and SciShow . He lives in Indianapolis, Indiana.