What is the most sold book ever
- What is the most expensive book ever sold
- What is the most expensive comic book ever sold
- What is the 2nd most sold book ever
- What is the most sold book in the world every year
- What is the most popular book ever sold
- What is the most expensive book ever sold at auction
- What is the most valuable comic book ever sold
- What is the most famous spanish book ever sold
- What is the most expensive page of a comic book ever sold at auction