1560s, "given to reading, fond of books," from book (n.) + -ish. From 1590s in the sense of "overly studious, acquainted with books only." Related: Bookishly; bookishness.
a bookish farmer who always had a book in his pocket
bookbinder
book-burning
bookcase
book-end
bookie
bookish
bookkeeper
booklet
bookmaker
bookmark
book-plate