Booker is the imaginary librarian of the school library. As his name suggests, he is a literal bookworm, as in worm that likes to read books. His name is a pun on the name Booker T. Washington, a well-known African American educator.
- It's Time for Counting (first appearance)
- Books Are Fun!
- Try It, You'll Like It!
- A Royal Welcome
- A Very Special Mouse (last appearance)