Recommend me books about Christianity/Religion

[Keyser.]

For whatever reason I recently became interested in the history/origin of Christianity. I am mainly interested from the point of view of a non-believer, i.e. I am not a religious person and do not wish to be after I learn about it. Actually, for background on what I'm looking for, it was this thread in SMP that piqued my interest.

Some brief shopping at amazon led me to these books. Let me know if you have any experiences with them or could recommend me some better ones. Lastly, I would like to add that I have no desire to wade through textbook like takes on religion. Lively, non-boring books are ideal:

Mere Christianity: Seems like the standard Christian book. I don't know anything about it but I assume it is preachy, and that is a bad thing for me.

The Rise of Christianity: looks good

Jesus for the non-religious: title seems fitting for me

God is not great: looks okay. I probably agree with the writer in theory, although I'm not sure if I'm looking for a book that just bashes religion.

thoughts?