I spent the last 6 months working on this project for about an hour every evening. I use this serverless Python web app framework on all of my sites (including compellingpython.com itself), and I got several great technical reviewers to look over the material, so even though there are a lot of potential improvements I think it's a solid guide.
This is the first time I've tried to sell something like this online, though, so I'd be grateful for any constructive criticism on sales flow, etc. Thanks!