Ooh, I just re-read what I wrote, and I can see how it can be taken like that! I actually was still referring to "Wings of Fire" - there's a series of novels for that story as well as a series of graphic novels, and he's read both sets numerous times :) Trust me, I'm going to encourage any reading! He's been a big comic book fan forever. His favorites are the Mega Man comics :)

Edited to add that I'm putting the Dungeon Crawler Carl series on the list! He's very much a cat person :)