Overall this book introduces a framework of IT investment with accurate definitions, sound practical advices, strong focus on value measurement of IT. I think it is a good reference for IT Strategic Consultant.The framework is so called 3P: five Pillars, Process, People. The five Pillars are Strategic alignment, Business Process Impact, Architecture, Direct Payback, Risk. Weighting and scoring method is heavily used at the planning and analysis stage while quantitative measurement of each of the five Pillars is extremely emphasized by the author.