It would make a lot of sense if Goodreads added the following categories to the My Books status:

Started to read but had to return to the library

Started but may never finish

Started but will definitely never finish

Using as a reference

(any more you'd like to add?)

What do you think? I mean, I'm sure I'm not the only person who doesn't always finish a book she picks up, for whatever reason. And just because I've put a book down doesn't prove I want to erase it from my list.