[vcherubini]

I wrote a book titled "Expert PHP Deployments" on how to deploy any PHP application using Vagrant, Capistrano, and Phing.

http://growingsoftware.org/expert-php-deployments/

It hasn't made me rich, but it usually sells about a copy a day. I love that it's entirely passive. I wrote it, published it, and it just sits there on my website making money.

It's also been a good way to build a list of people who would be interested in other things I make.

PS. Use coupon code "hn" for $2 off if you're interested.