Advent Calender - H_H

23rd

(1) Riddle:

I hold more books than a library. Good books, bad books, sad books, fact books, gripping books, unfinished books, books in different languages, personal books, long books, short books, easy-to-find books and every type of book imaginable. But I fit myself into a tiny space, sometimes as tiny as a playing card. What am I?

Answer to previous: A skull

(2) Shout-out:

MillieCookieMartinez

(3) Fact:

Nabil Karam has the world's largest collection of model cars - owning 27,777 as of 17th November 2011.