At the end of 2006, Claire over at Simple-Talk put together a book of recipes "by geeks for geeks". It’s only tenuously linked to the Business of Software but it’s a cool idea, and an example of how you can give away eBooks to drive traffic to your web site.
Besides, I’ve always wanted to have a blog post entitled "It’s a cook book!" and it’s the only way I could think of doing it. Award yourself a gold star if you get the reference without looking it
up in the characteristically overly explained wikipedia entry.
Here’s the link:
http://www.simple-talk.com/opinion/opinion-pieces/the-simple-talk-cookbook/