Graphic novel. So comic book with a longer storyline than comics. Think of comics as novellas and graphic novels as books. I personally like graphic non-fiction. Which is basically illustrated books with more illustrations that are also artistic and usually higher quality that just a novel with some illustrations. A guy who used to hang out with Jeffrey Dahmer made My Friend Dahmer and I read that years ago. Around the same time I read one about the Green River Killer. And what got me into them was the slice-of-life alternative comic which got the author a regular appearance on David Letterman until he kept criticizing General Electric, American Splendor, by Harvey Pekar.
I heard that one with Homelander in it was good but I never looked into it. Most of the graphic novel section at the library is all just bound volumes of multiple comics now. 20 years ago when I dated a librarian it was different and it had its own section but now many of what are actually graphic books - both nonfiction and fiction - are in the kids section, so single adult men can't go there without a "guide".