This book investigates three perplexing historical mysteries including Cleopatra's final resting place, King Arthur's questionable existence, and the fate of the princes held in the Tower of London. Readers will enjoy the story-like writing style all while learning about history, from ancient Egypt to royal England. Complete with sidebars, more facts, and informative diagrams. 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.