Comics ... are ... pictures! Or, rather, the medium has always been defined as such. In the "old days" there were never novelizations of comic books/stories; however, in the last decade or so, more and more are showing up. Also, Comic Bookdom is often fraught with rights issues and unclarity of who owns the right to create or amend to ... Canon rules, everybody else schools (as it were; I dunno - I make this stuff up as I go..)
Warhammer - Chew! Dang good series; been reading that one since day one.