Matching

Some people may know that I am kind of weird about my books.  Here is one example of my weirdness...

If I get books that go in the same series or are by the same author, they had better look the same.  In the picture below, the left half are series where just one book does not match.  The matching series are on the right.  They look so much better and they look like they all belong next to each other.  It annoys me that I think like this, but I have exchanged books before so they all matched...