Books by Charles Ginenthal are available in unformatted form as free downloads at a website established for that purpose:
Those books formatted for ebook readers such as Caliber are available on Lulu.com and since Lulu is a sort of a clearing house, should also be available on other ebook venues shortly.
Charles Ginenthal on Lulu.
The second edition of Cosmos in Collision is also available in ebook format on Lulu now.
The Caliber generiuc ebook reader is a free download.
The second edition in paperback
Human origins, the real version: