Back in '64 (the debut year of Jonny Quest), Gold Key Comics (who made comics of multiple licensed characters, their own series, and re-prints of things that came from Dell Comics "Four Color" (when Dell and Western Publishing were partners)) published a one shot (1 issue comic book) about the first episode "The Mystery of the Lizard Men". The comic is extremely rare and is a hard find. Here's a picture of the front and back cover:
I'm not sure who did the artwork, and I'm not sure if it's Doug Wildey (the shows creator and comic book artist). I did like The episode, and thought it was pretty good. I've never read the book, but thanks to ClassicJonnyQuest.com, they give you a page and some extra stuff. Here's a page:
Also here's the characters page. Hadji wasn't in the episode so here's not on the page, but on the cover, there's a box that has the characters on it, including Hadji.