This book is remarkable. The subject of IT strategy would be dry even to those involved in it. Personally, I have little interest in IT and none at all in strategy, but I picked up this book because of my interest in the way that companies (fail to) work.
Potts' stroke of genius is wrapping his message into a highly readable parable, with some bullet points reiterating the message in a more formal way at the end of each chapter. The protagonist's conversations (with, frankly, the sharpest set of business people you could imagine - not like any I've ever met!) are concise and targetted, losing the fluff and circuitous discussions you would get in a normal company.
I didn't think I could whizz through a business book this quickly, nor be as engrossed. Highly recommended!