I agree with the other reviews here, that this book is a can't put down item, although a takes a 2nd read to start to understand the concept more clearly and then the even more difficult bit is actually being able to put that concept into practice within an organisation, I strongly believe that not only does the entire culture of the organisation need changing in line with the TOC concept but it must be part and parcel of the way the whole organisations operates. I work in large global telecoms company and we are just beginning to adopt this way of thinking in our business and are due to start making in roads into the cultural issues surrounding the adoption of TOC.