Did You Hear The One About

A student goes into the library and asks if they have any books on boomerangs. The librarian says, "You're in luck! This one's just come back."

Why was the T-Rex afraid to go to the library?

    Because her books were 60 million years overdue.

Do you know how many librarians it takes to change a light bulb?

    No, but I know where you can look it up!