My bookshelves haven't changed too much since I organized them in July. I did buy about 8 used books at a rummage sale this Summer. I've donated 15-20 books this year. I've straighten them up and moved a few around.
I have a stack of Christmas themed books to read over the next month. What I don't read, I can read next year. I haven't bought any for a couple years. What I normally do is find Christmas themed books at the thrift stores and save them back to read in December/January.
The book I'm currently reading has 4 stories and I've read 2 stories so far.