A book about a Jesus that never existed. Early Christianity and Roman mysticism are not among the subjects I have read a lot about, so there were quite a lot of ideas that were completely new to me and whose veracity I can't really comment on (and which don't affect me enough to research).
The book proposes - very roughly - the idea that Jesus originally was a mystic being whose actions and crucification only took place in "outer space", i.e. a mystic shpere and was only later projected into history for the masses, while the early sophisticated Christians knew he never really existed on earth. I bought the book more out of a lingering affection for Zacharias Sitchin and Erich von Daeniken (come on, admit it, they are fun!), but I have to admit that the book seems - in and for itself - rather a lot better reasoned than those.
However, I don't find the book completely convincing, even if I can't really point out any logical errors (but then, I am not a specialist either on Roman history or on scientific method and its use in history. Even if Dr. Carrier repeatedly points out that he is not personally interested in the outcome of his analysis, from some quick glances at blogs about this subject matter, there seem to be very few authors on this subject who don't take this personally.
Some parts of the book seem repetetive, and I fear that a book with this amount of Background Information and scientific depth is best consumed as an audio.