I also started doing this and I believe that I found LeanPub from you years back. I started in 2013 doing a book on XML and C# and made ~$20 from it. I never finished and never marketed. That book idea got picked up by Apress and the full new version of it will be released next month. I want to write a bunch of new books in the future but will definitely do it through Leanpub and avoid the traditional publisher.