Simply put, this booked provides an excellent set of blue prints using the Microsoft stack which is going to prove useful for at least the next 5 years. I'd suggest the timing of this release is perfect given the current state of Azure, AppFabric, and the Sql platform. The level of detail is appropriate to get the core concept of the architecture across, whilst providing the relevant detail of how each component contributes to the over architecture. Each architecture has a number of proposed solutions, and a decision framework attached to it which is used to help understand which solution meets the most requirements. This is a book that I will be reaching for time and time again, not only in coming up with new designs, but also explaining existing ones.