I absolutely adore this series (Pyramid, Cathedral, Castle, etc.) I had the opportunity to meet the author at a benefit hosted at the Museum of the University of Pennsylvania around 1987 or so, he's amazing.
This book, and the companion video, give incredible insight into the mammoth human effort, gargantuan investment, and astonishing technical knowledge that went into building the monuments we still tour in awe today. McCauley balances technical information with accessible characters, creating pieces that allow people both young and old to understand the human story behind architectural masterpieces. Many of his works are required reading or supplemental texts in elementary and secondary schools, if your school does not offer them, considering donating one or more of them to your local library.