One of the aspects of our industry that I find most exciting is the amount of change and progress. Sometimes that progress means that even ideas that have come to be considered accepted wisdom need to be revisited. In some of my talks I've been arguing for a while now that we need to reconsider the general preference for buying software (over building it).
At the same time Rien Dijkstra was in the process of editing a collection of essays on the topic of sourcing IT and he kindly invited me to contribute my ideas. I was more than happy to accept his offer and I am proud to be part of this collaboration. A preview of my essay has been published on this site as an article series. Now the book is published and widely available.