#11 LibraryThing

Full marks for ease of use - easy to set up an account, easy to add books. If I had a computer at home and could tear myself away from online games (why I don't have a computer at home) I could get into this. Once hooked on an author I tend to read through everything they have written and can see a use for being able to check which titles I already have while in a bookshop or library - if only I had a mobile phone. This is my bookshelf