I've had this book for quite some time now and it definitely deserves a long overdue review. I was looking for something that gave an up to date insight on how real applications are built using some of the most popular and proven patterns. There are too many books around that go head first into one specific way of doing things, and it quickly becomes apparent that you cant apply a lot of the techniques to real world situations. This book is not one of those.
Scott provides an introduction to some popular and common design patterns (at which point you will probably find yourself saying 'oh yeah, i used that in <insert your previous project here>'), how they are categorized and most importantly how to read, understand and apply them. He then moves swiftly on to show how these can be used to piece together a rich layered framework on which to build an application. There are various examples of how the various layers interact with each other, all in a very well explained manner, making it easy to understand for developers at any level.
I made the mistake of taking this book into the office, and it has been the source of many conversations since.