Books You Don't Want to End

I’ve always had trouble remembering the endings of books—which I have decided is simply a case of denial, the result of wanting a particular book world not to come to a close. But there are also books I just plain don’t want to finish, because I’m enjoying them so much. I suspect this is a fairly common phenomenon, that feeling of not wanting a good book to end. But do others find themselves slooooooowing way down while reading, or reading only a few pages at a time—in essence, sipping the book instead of gulping—to make it last? I have been doing this a lot lately, and worse: I have found myself simply not reading the last volume in a series. (I always buy the last book; I just avoid reading it, and look at it guiltily on my shelf.)