http://www.leanpub.com/php

I work (flexible) full-time at a Uni, which allows me to spend decent time with my three young children and act more as a primary carer than a part-time dad. I don't want to give this up, but extra money is always useful. I'm currently trying to generate some extra income in a (fairly) passive way, at least without giving time commitments to people. I've written this book as a first step, as it was something I could do in my own time and on my own schedule, and I'm now wondering where to take it next. I've considered consulting (which I've done in the past) linked to the book but that doesn't fit my aim of "in my own time and on my own schedule". Does HN have any ideas of where I can go from here?