You would call them someone who peruses.
Returning officer
A person who destroys books is a biblioclast.
A person who writes books is called an author.
A person who sells books is commonly referred to as a bookseller or a book vendor.
An editor
Bibliophile
bookworm
A bookbinder.
An Illustrator is the person who draws pics for books the author is the writer
Bookeeper!
sado
Author