Hard to say, I don't feel all that attached to any physical books. The words are what I keep and the books themselves can be replaced. But I think I might grab my copy of The Portable Nietzsche. It's one of the only books that has some notes and highlights in it. Of course, I got it used, so most of that is not mine. But some of it might be, so I should probably hold on to it so I can figure out what I marked and considered important at one point.