I’ve been keeping a record of all my books on this site for a while now, and I probably will keep on doing it; however, when I went looking for an alternate source of book covers, for those that Amazon couldn’t provide, I found LibraryThing.
It does pretty good job of storing a book collection, and it gives me series information through its API. (Which I’m mining for my personal application. Call it my ego at play.) Also it appears to have a pretty good recommendation engine. Not so keen on the member recommendations, but the system ones work.
Anyway, my bookshelf is now available to see. Should be pretty obvious the kind of books that I like.
Can you import books from an external catalogue program?
Give it a list of isbns, and it’s happy. 200 book limit on the free version. $10 a year, or $25 for a life time membership to take that limit off