Do I have your copy of Choke?

In attempting to pare down my giant book collection yesterday I discovered that I have two copies of Choke. Is one yours?

Have I mentioned that Anathem is totally awesome?

"Our opponent is an alien starship packed with atomic bombs," I said. "We have a protractor."
"Okay, I'll go home and see if I can scrounge up a ruler and a piece of string."
"That'd be great."

CDs

Once I get all my CDs loaded into itunes, is there any reason to hang on to them? I pretty rarely play a CD itself these days, and I'm just thinking that's one more box to put on the moving van...