The most visible civilization is also the most "hidden"

The pyramids, sphinx, colossi and temples, for all their scale, simply magnify Egypt’s mystery... Ancient Egypt today is still the realm of the hidden. Hidden tombs, hidden mummies, treasures, knowledge, mysteries and dangers. Think of hieroglyphs, requiring a code to decipher. Hidden coffins nested inside other coffins... Once known as The Two Lands.... Upper Egypt and Lower Egypt. But there are three Egypts. Upper Egypt, Lower Egypt and HIDDEN Egypt. Delve into the realm of the hidden in this series of mystery adventure thrillers.