"Enterprise Application Integration" provides an interesting introduction to the important topic of EAI (Enterprise Application Integration).
EAI plays a key role in many businesses across many scenarios (for example, implementing an Enterprise Application and/or integrating the technologies of an acquired company), so this book covers an important topic.
This book as a whole is oriented towards technologically-savvy individuals, but several sections of the book, such as the coverage of "what is EAI" should appeal to, and be of great value to, a wide audience.