A super-huge congratulations with regards to the book. That's a massive accomplishment.
I wrote my first book a few years back. It was about something called WebSphere, and tt was so bad that nobody wanted to publish it.
I took the pdf and went to a self-publishing site, and within a week I actually had a hard copy of the book, a listing on amazon and every other online bookstore, and the ability to sell pdf files through amazon or on my own through PayPal. And a few months later, I had the best selling WebSphere book on Amazon.
The cost was really small to set things up. I'd be more than happy to lend you some of my time, look at your project, and tell you what it would take to actually get a real book made, and have a pdf available for download. Plus, you can charge an outrageous price for the print book, and a low price for the pdf, driving people to do the download instead of wasting trees and forests.