It appears this set includes two more books, which I have not (yet) bought.
The Jesus Mysteries: Was the "Original Jesus" a Pagan God? (1999)Until I have these last two in hand, I won't try to write about them. However, I may have to acquire them — or at least the older one — before I start reading this series.
The Gospel of the Second Coming: The Long-Awaited Sequel (2007)