Congrats! Any comments on how straightforward you found completing the book? Did you get stuck at any point? What was the most difficult part? Also, do you hav

Congrats! Any comments on how straightforward you found completing the book? Did you get stuck at any point? What was the most difficult part? Also, do you have a marketing plan? How are potential buyers going to find this? Random SEO tips from a quick look: clean up you heading hierarchy (start with H1, nest H2 - H5 appropriately; right now they're pretty random), add ALT text to all images (the ones with source code could get you more search hits for example), add a meta description and also add HTTPS (very important for security as well).