The books are both mine and I love them. I felt like Lizzie would like books about books and they were the right sort of thing to have her moving into her bag — small, colorful and easy to pack away. As is frequently the case with Lizzie’s things, sometimes a prop is just a prop, but I still like to have them not be so far away from things I think she might have with her.
As a related side note — Anne Fadiman’s Ex Libris is one of my very favorite books. It’s a book about loving books, so I suppose I was preconditioned to love it, but it is honestly some of the greatest personal essay work I’ve read. It’s one of my favorite books to give as a gift. If you haven’t read it, do yourself a favor and buy it. There are so many great lessons about love, life and literature in those pages. I cannot recommend it highly enough.