In this suggestion, Maggie directed me to LibraryThing, where, if one is so inclined, one can catalog and categorize one's books, as well as getting suggestions based on what you have, writing reviews, etc. Even I am not up to the level of time-wasting it would take to add every book I own, but I did add all of those I have read in the past year, with the intention of keeping it up as I read. My bookshelf is here. I like this more than my previous way of tracking my reading, if only because I don't have to alphabetize it myself. Now if I could just find a way to keep a "to-read" list on it, I'd be all set.