Below are some Peanuts books that I own. I decided to scan them here for you to see. These include front and back covers. Included here is The Doctor is In, which had a coin container for her nickels, and a small book with Lucy's thoughts.
Here's the books from the Peanuts Philosophers set that was shown.
Here are some titles that I don't own, but I thought I'd share them with you. All of them can be found on Amazon.com.