Several Riddles

Tonight I told some jokes at the "food coop." Here's what I said:

What is a zombie's favorite film?
Singing in the "Brain"

What is a harpist's favorite book?
Lord of the "Strings"

What is a podiatrist's favorite food?
Sloppy "toes"

What is a cat's favorite book?
The Great "Catsby"

Still more jokes.