A group of third graders solve fun mysteries in this collectible boxed set that includes all six books of the Third-Grade Detectives series! This collectible boxed set includes: The Clue of the Left-Handed Envelope The Cobweb Confession The Mystery of the Hairy Tomatoes The Puzzle of the Pretty Pink Handkerchief The Riddle of the Stolen Sand The Secret of the Green Skin | The Third-Grade Detectives Mind-Boggling Collection (Boxed Set) by George E. Stanley, Paperback | Indigo Chapters