How many pages does the book The Borrowers by Mary Norton have?

The Book The Borrowers is about little people around 5 inches high that borrow stuff from us humans, such as a coin, string, esc. They often put it back afterwards though, But some borrowers, 4 of them, they live in a house and they live udner the floor bourds. The daughter of the family gets spotted by the boy human being (child) and they become friends, somehow the parents get put into a labatory looking for their daughter and are going to be on TV because it's an amazing discovery, But the little boy and the daughter (also a borrower that the daughter meets) rescues them. :) Hope this helps!