Do you have a lot of books? Or are you interested in what other people think about the books you’ve read? Take a look at LibraryThing, a free service that helps people catalog their personal libraries and connect with others who have similar reading interests. From LibraryThing: “You can access your catalog from anywhere. Because everyone catalogs together, LibraryThing also connects people with the same books, comes up with suggestions for what to read next, and so forth.” Registration is free, or feel free to use the search function without registering.