biblioklept
[ bib-lee-uh-klept ]
a person who steals books
USE 1
The rare book room was closed temporarily after a biblioklept made off with several first editions.
USE 2
The librarian was always on the lookout for the biblioklept who had been pilfering from the classics section.
USE 3
As a biblioklept, he had an extensive collection, but none of the books were lawfully his.