My 8 year old son loved this book! He had so much fun solving the mysteries. The book has 16 short mysteries to solve. You read the story which is followed by a few questions to think about before you flip to the end of the book to read the conclusion of the story. The conclusion includes a "Bible Evidence" verse that ties in with the mysteries. The book also includes a section of secret codes in that back for added fun. Like all Adventures in Odyssey products it is engaging and fun and promotes Biblical values.