book-worm

Noun

bookworm (plural bookworms)

1. Any of various insects that infest books.
2. (figuratively) An avid book reader.
   • “This,” remarked the sedate observer beside me, “is a bookworm,—one of those men who are born to gnaw dead thoughts. His clothes, you see, are covered with the dust of libraries.1846, Nathaniel Hawthorne, “Earth's Holocaust”, in Mosses from an Old Manse

   Synonyms:

   bibliophage, bibliophile, bibliovore, book lover, librophile, librovore