Don't generally re-read

I don't generally re-read books, feeling that I have so many other books I want to read, and only a limited lifespan in which to read them (Unless Jorge Luis Borges was right, and I kind of hope he was). But I may have to start. (I did dig out my copy of Fagan's "The Little Ice Age" the other night - I think I want to re-read it after finishing the current book on ice ages. While the Little Ice Age was not a true Ice Age, it certainly was an interesting climatic era.)