Winners have been selected!
First, thanks to everyone who participated – the entries were all of very high quality in my opinion!
First Prize 
The Markdown Tutorial by eh3rrera
all 16 books in my recommended reading list, or the Amazon value equivalent in a gift certificate ($440.74)
Second Prize
http://www.markdown-tutorial.com/ by @jacobswain
a CODE Keyboard. This can be shipped worldwide.
Third Prize
Tutorial.md by @agea
3 books of your choice from my recommended reading list, or the Amazon value equivalent in a gift certificate ($125.35)
Congratulations all! I’ll be contacting the winners to figure out where to send the prizes. And I’ll send our individual feedback to each entrant, as well.