I'm always reading many books at a time. It might be quite unorthodox, but what I do is, since I'm always surrounded with books, I'll read a page of physics, and then I'll read a chapter of a novel that I really love, and then I'll say, "Oh well, what does that mixture do in my head?" I adore reference books. I love encyclopedias. I also like just going back to original texts, because a lot of these self-help books today.