Identify this Atheist Speaker

Not too long ago, I ran across a video of a certain famous scholar who writes and debates about religion/atheism. But for the life of me I can’t remember his name!

The video I watched had him debating a rabbi, and he made a bet with the rabbi that involved one or the other having to buy 100 copies of the others book. This ring a bell with anyone?

Christopher Hitchens & Rabbi Shmuley Boteach