I was lucky enough at the time, that my two business partners saw the value in the work and I saved one day a week to devote to writing. I also spent any other free time writing, editing and curating examples for the book —often at night while watching tv and on the weekends. The first version was gruelling—several months of writing and editing. The 2nd Edition only took a couple of months. More editing and updating rather than 100% new content.