Playing with Google Books' My Library

Google announced the new My Library feature to Google Book Search. Now this would be a nice solution for me as I already maintain my book list in Delicious Library and I wouldn't mind a free alternative that is easy to use.

Unfortunately Google's book index is not complete (e.g., I can't find 'After the Ball'). This might be because of publishers asking not to be listed in the index. Either way it prevents me from wanting to use it if the list is going to be incomplete.