The original I Spy book has been adapted for younger children. Rhyming riddles with picture clues in a sturdy board book format make this perfect for preschoolers. Full color. The I Spy Book Series is celebrating its 20th Anniversary in 2011. I Spy Books are published by SCHOLASTIC, a highly trusted brand among parents and educators worldwide. The I Spy Picture Books are very popular with kids and are based on rhyming riddles and finding/matching the corresponding images in the picture. The I Spy Books are fun, educational, activity-oriented, and help develop early learning skills (reading, visual discrimination, cognitive thinking, spatial relationships, hand to eye coordination, and interactive play).