I tried digging around keith johnstone but i could only find theatrical improv which, unless it flies above my head, had very few to do with the workplace dynamics of real jobs. Unless the concept is to insist on the fact that adult life is just a play and treat your day like a space of randomness to disrupt the established roles ?
The book is not only about improvisation theatre but I don't want to describe the ideas, as they can spoil the experience of reading it for you. I have yet to find another source that can describe the power dynamics (also in life) as succintly as he can.