Simon's walls were covered in what looked like pages ripped from a comic book, but when I squinted, I realized they were hand drawn. Some were black-and-white, but most were in full color, everything from character sketches to splash panels to full pages, done in a style that wasn't quite manga, wasn't quite comic book.
Kelley Armstrong (2009). “The Darkest Powers Series, Book 1: The Summoning”, p.195, Penguin Group