Transformational change is right up there as one of the most popular topics discussed at Agile Yorkshire, it always has been and it probably will be for many years to come.
Mike Burrows has been a regular speaker at Agile Yorkshire and as a published author on the subject and the founder of Agenda Shift he is someone who definitely worth listening to on this topic.
Whether understanding top down and bottom up tactics, looking at things from the prospective of a transformer or the transforming his sideways look at things will make you stop and think.