Ancient Egypt 39,000 BCE: The History, Technology and Philosophy of Civilization X by Edward F Malkowski
There are many books and authors out there who are dedicated to the idea of an ancient prehistoric civilization which existed over 10,000 years ago. Mr Malkowski brings much of the evidence that civilization was in much of Egypt way before the Dynastic Periods. Much of the information I had heard before, but this book goes into greater detail and is updated with a few new discoveries.
The Great Spinx has a chapter on the water erosion and takes a look at British geologist Colin Reader's work that states the Great Sphinx was built during the time orthodox Egyptologists claim. There is a very interesting part of the book on erosion effects and it gets pretty deep to show how Mr Reader's claims do not hold up to scrutiny.
There is also a few chapters on the purpose of the pyramids, and Mr Malkowski suggests they were used to ionize the atmosphere to help grow crops in the areas. It does seem like a lot of work, but if it paid off in the next few thousand years in abundant food supplies the peoples of antiquity did get their money's worth. There are so many books on the pyramids out there it is difficult to state what they were used for, but the power supply theories do make sense. What that power was used for still is a mystery.
There is much other evidence gathered to support the hypothesis the author makes, mainly the use of machine tools to do much of the work. Christopher Dunn's work gets a lot of citings in this book as his work has much merit.
Mr Malkowski also looks at the possible cataclymic events that could of led to the wiping out of Civilization X, and he thinks it is possible a hypernova caused lethal gamma rays to wipe out much of the population of humans and large animals.
The author stays away from archeoastronomy and anything related to ancient aliens to make his case. My one problem is much of the book is a retread of other people's work from Christopher Dunn to Graham Hancock. Still, the book is a great read and does have enough information and physical evidence to make the case for the existence of Civilization X. No smoking gun (although the Great Sphinx is the closest to the smoking gun found in my opinion), but the author does rightly think that the vast majority of the evidence is still buried in the sand. Including possible Halls of Record which might reveal who Civilization X was once and for all.