I had been really thinking for a long time how important it is that people give themselves permission not to slog through books that they're not enjoying. Just because a book won a prize or because your best friend loves the book, if you're not enjoying the book, what that really means is that that book, for that moment, it's not the right book for you. So I always say that what you need to do is put books down and not feel guilty. It's really important to me that people love to read, not just read because they feel they have to, although I have to say, Heidi, if it's a school assignment or for your book club, I do think you need to read the whole book. So I came up with the Rule of 50, which is that you should give a book 50 pages, and at the bottom of page 50, ask yourself, "Am I really enjoying it?" If you're not, return it to the library or lend it to a friend or put it on the bookshelf and wait until maybe your mood would change and you want to try it again. And that rule for me worked really, really well, until my own 50 started edging ever closer to 60. And then I realized that when you're over 50, time is really short, and the world of books is really, really large. And so I had to give a little corollary to my Rule of 50, which is that when you are 51 and older, you subtract your age from 100 and that number, which grows smaller every year, is the number of pages that you should read before you give up on a book. What this means is that this is a great reward for those of us growing old. And it also means that when we turn 100 and we can judge a book by its cover!