I've read a number of books on lost civilizations. Over time I'll include all of them here and a discussion of each.
As a first step, here's a listing of some of the most relevant books:
The Lost Civilization Enigma, Phil Coppens, New Page Books, 2013. See Essay building on ideas addressed in this book. Click here to read. Forgotten Civilization, Robert Schoch, Inner Traditions, 2012. Lost Civilizations & Secrets of the Past, Michael Pye & Kirsten Dalley (Editors), New Page Books, 2012. Lost Cities & Ancient Mysteries of South America, David Childress, Adventures Unlimited Press, 2011. Lost Cities of Ancient Lemuria & the Pacific, David Childress, Adventures Unlimited Press, 2006. In Secret Mongolia, Henning Haslund, Adventures Unlimited Press (Original printing 1934), 1995.
Black Genesis: The Prehistoric Origins of Ancient Egypt, Bear and Company, R. Basuval and T.Brophy., 2011.