Ajay Balamurugadas, founder of Weekend Testing, active proponent of context-driven testing in India, and an all around great guy (I've met him, I can say that :) ) has written an E-Book about some of the things he has learned in 5 years of active and passionate testing. The E-Book is called 'What if..." and more about it can be seen at this link.
Many of us have great ideas but we have a limited reach in how to get that information out to people who are interested. We have our individual blogs, but I think it's great that w have these additional ways to communicate our ideas and our passions to others, especially in situations where we can earn a little return for our investment of time and energy. For those who have read Ajay's blog, you already know how much he loves the topic of testing. Help support testers writing more and getting their ideas out there. Who knows, maybe some larger publishers will take notice and help more testers spread their messages. You never know :).