What is the most common book
- What is the most common book size
- What is the most common book font
- What is the most common book in the world
- What is the most common book genre
- What is the most common book cover color
- What is the most common book title
- What is the most common book format
- What is the most common book to read
- What is the most common book series
- What is the most common book color
- What is the most common book font size
- What is the most common book page size
- What is the most common book trope
- What is the most common comic book font
- What is the most common font for books