The pyramids were built as tombs for the Egyptian Pharaohs. They are an engineering feat that have puzzled scientists and historians for centuries. How did the ancient Egyptians construct these massive structures? This real unsolved mystery will unfold with simple text and exciting visuals. Decide for yourself with actual clues, facts, and photographs. About This Series: Take a deep dive into some of the most unbelievable but real unsolved mysteries from history with this brand-new series of books. Can someone just disappear? Is there such a thing as a buried treasure? Does Bigfoot exist? Each book in this series focuses on one unsolved mystery and describes its main events chronologically. Readers will follow along as the exciting narrative uncovers real historical clues. Multiple theories will be presented providing an opportunity for readers to draw their own conclusions. The most up-to-date facts and relevant modern-day discoveries will be included to allow for real-world connections. Perhaps you will be the one to solve an unsolved mystery!