I just sent out an email to the Children's staff regarding the books to share. Eileen spoke to Carolyn Benjamin, Head of Tech Services, and "picture books for older readers" is too long for our catalog. I bounced a few ideas off Eileen, and these were some of the alternatives I came up with:
In Between Books
Jump into (something)
I like Bridging Books since they are a bridge between picture books and fiction books, but it does sound like a bunch of books about bridges. Hmm. Hopefully the staff will have some useful thoughts.