We all had our favorites. I loved Black Beauty, Tom Sawyer, The Wizard of Oz, and Beatrix Potter stories the best. Beatrix Potter was one of my inspirations for drawing. Her illustrations were enchanting.
But the reason that returning Arlo's favorite book every 2 weeks is that he didn't want to let it go. It didn't occur to our parents to actually BUY the book. Thus, Arlo would emulate his favorite character when told that he had to return "his" book....or when he realized that his book had been checked out by someone else. He became "contrary".
Luckily, Arlo outgrew "Contrary Woodrow" and went on to other things. Just as Woodrow did, in the book.