Writing a few thousand words in the space of a couple of days is obviously a big effort, but there are a couple of reasons I don’t charge for the books. Firstly, although everything is written by me, the book exists because of the generosity of the people who have given their time to talk, and the people who took the time and risk of setting up the event. I’d hate people to think I was trying to profiteer off their efforts to make a quick buck by selling an ebook. Even if it only ever upset a couple of people, the tiny amount of money it would generate isn’t worth it.