This title traces the history of the kraken and its long list of recorded sightings. The legendary size and terrifying tales of the kraken are fully explained by the end. The kraken is one mystery that gets solved. QR Codes in the books give readers access to book-specific resources to further their learning. Aligned to Common Core Standards and correlated to state standards. DiscoverRoo is an imprint of Pop!, a division of ABDO.