Thing 14 - LibraryThing

I like the idea of LibraryThing and have been looking for just this kind of tool. I have an English teacher who has a list of book recommendations for her students. We want to be able to list these books, and give the kids the ability to write comments about the books. LibraryThing seems to do just that, but I don't want so much clutter... I just want a simple site that allows only my students access. Any ideas?