Theuerkorn discusses an enterprise architectural framework known as lightweight enterprise architecture (LEA). LEA is an architectural method inspired by the author’s personal experiences during his career. The use of “lightweight” suggests an approach that is easy to implement, because it applies a set of artifacts that can be customized toward the needs of the users.

The book is divided into three sections. The first section addresses the current state of practice in the deployment of enterprise architecture, and how architecture is constantly changing. To this end, the section discusses the notion of architectural chaos, where architecture needs to fit within the enterprise, and also includes various discussions of industry methodologies and approaches.

Section 2 tightens the focus on the need for architecture. It introduces the LEA framework, which sets the stage for the chapters that cover associated areas, such as strategic architecture, conceptual architecture, and execution architecture.

Section 3 discusses the implementing architecture. It covers the philosophy behind LEA, the cycle of LEA, a work plan for deploying LEA, and issues related to dealing with a misused and/or improperly implemented architecture.

The main contribution of this book is to document an architectural framework based on practical approaches in a business setting. It discusses the gap between business and information technology, and attempts to provide some remedies to bypass those problems, and to bridge the gap between business and IT.

The book is well written and well organized. I recommend it to project mangers and leaders. The book also makes a superb reference for students interested in planning or the managerial aspects of software projects.