"A breath of fresh air.”—Kirkus Reviews, starred review

“Readers may be inspired to craft their own cardboard kingdom after finishing the book. A must-have.”—School Library Journal, starred review

“Imagination, these kids prove, can erase what seem like unbridgeable differences.”—Publishers Weekly, starred review

“Vibrant and rich…. A cross between Stevenson’s Nimona and Raina Telgemeier’s characters.”—Bulletin, starred review

“This easy-reading story offers—in a fun, engaging package—a meaningful commentary on the importance of childhood games.”—Booklist, starred review