Glad the author shared his methods. If you're going to repeat this, I'd suggest you give it a try with the first 10 to 15 pages. Something like a small zine. Then use all the tools and make sure you get the output you're expecting.
I've written several booklets that I sell on Amazon and my website. If you're interested in writing but not ready to commit to a full novel, try publishing a small zine or two. It's a lot of fun.
My latest is a series that teaches JavaScript by creating computer art. Readers learn by copying.