I read this book a couple of years ago, and at the time, I was employed by a rather large regional retail organization dealing with very similar issues. I found myself replacing the names of the characters in the book with those of my own co-workers as I read and suffering a profound sense of deja vu. I cannot recommend this book strongly enough to anyone working in or with a business of any significant size, in IT or not. Gene Kim and team have put together a story both entertaining and truly educational. You will come away with an eyeopening respect for DevOps, business goals, and the role of IT in business.
I had the pleasure of meeting Gene at a conference not long after the book came out and my respect for him and his mission to educate the world on the challenges of effective devops has only grown since.