Examples from literature

• He was not a bookworm, but he was a close student and possessed the happy faculty of assimilating knowledge from books and tutors far more easily and quickly than most of his fellows. 
• I'm a sort of bookworm myself. 
• Neither Leo nor I were bookworms, and we were not by any means so devoted as some boys to games and athletics. 
• The librarian of former times was almost invariably a bookworm, and was often a student properly so called. 
• Well, long ago I was a little bookworm, living in a lonely country house, and I had the run of some good shelves.