I’m a Shelfari user. I don’t know if I’d say I’m crazy about the site because I really only use it to catalog my books. I visit the site about once a month. It is technically a social networking site, though (self-proclaimed, “premier social networking site for people who love books”). I do use my account to feature My Shelf on Myspace and Facebook profiles. Anyone interested in connecting can find me here on Shelfari. Aside from a few recent book purchases, you can also see every book I own. I took the time to put in every single ISBN and in a few cases had to dig around (old books that didn’t have ISBNs). I like it. I like the hominess of the site, the community. That said, I like the clean look of Google Library and I already use so freaking many Google products, that it would be nice to have them all interconnected. I haven’t yet added anything to my Google Library, but like all things Goog, I automatically have a library. I could go on a tangent here about Google-addiction, but I won’t. I’m sure that by this point in time, everyone out there can feel my pain love for Google. Here’s my very empty library. You can use Google Book Search to find a library in use. One major plus I noticed with Google Library is that you can type or import a list of ISBNs instead of adding each book to library one at a time. I can tell you, that is incredibly time consuming. I couldn’t find that feature in Shelfari, but with Shelfari you can actually import your Amazon Wishlist or other book lists from a URL. You can also import txt files with your list of books. For now, I plan on sticking with Shelfari, but I may just fill up the Google Library and really give it a chance to defend itself.

Which do you use? If you don’t use anything, tell me why not.