A "book hoarder" is someone who collects and keeps many books, often in large quantities.
Sentences with «book hoarder»
It's for readers, browsers and compulsive book hoarders, mostly of romance novels. (blog.feedspot.com)
I wanted to make sure Tiff had plenty of room for storage, mainly so it would be easier for her to keep her room clean, but especially since she's a huge book hoarder! (stoneybrookestory.com)
It's funny that other people have mentioned being a book hoarder because I DO love to buy (and read) books. (bookbrowse.com)