The First Challenge in WPL Was YELLOW

This one was a difficult challenge, maybe I had too many ideas and it took time to try them all out. Here are two of the ideas I didn't use.
The books were really hard to get into good focus, so I dropped that idea. But I had filled a whole shelf with yellow books, this is about 1/3.

I tried several dictionaries and the word yellow. I liked this one best (Yellow River) but didn't think the DPC'er would like it. The idea was not bad, but I was not able to turn it into a good photograph and dropped it. I will post my "real" entry in a few days when voting is over.