There are some important topics in cyber-security that are very important, but may not require an entire book to cover in detail. When it comes to online communication using "covert channels" and "stegenography", Syngress does what is excels at: they cover the topic in the context of a fictionalized narrative to give it a "real world" context. While not as excellent as some of their other efforts in this genre, Syngress still does a good, but not perfect, job with Hacking a Terror Network: The Silent Threat of Covert Channels (364 pages , SYNGRESS, 2005, ISBN 1-928994-98-9).
The context of this book is a revenge-motivated terrorist attack, borne out of the first Gulf War, against targets on the United States. Some might question how realistic the scenario is or is not, but the book weaves a story which may ring all too true today. The threat of terrorism is real, and it could/would be too easy for people with evil purposes to use covert channels to plan and coordinate an attack.
Without giving away a surprising plot twist, it is hard to envision how the scenario lain out in this book could be realistic, but then again no one on the streets envisioned 9-11 or the recent bombings in London either. What Rogers does in this book is effectively explain the different types of covert channels that can be used, tools that are readily available to use the channels, and tools that are available to detect their use. He also demonstrates that how, without a stroke of luck, it may be virtually impossible to detect the use of these channels.
The book is not written as tautly as it could be and at times you might want to say "Just get to the point!". And there are some items in the book, such as the presence of an Internet Cafe in Iraq in 1991, that require as they say in Hollywood, the "willful suspension of disbelief". Put these things aside and you will learn some new things and technologies you may not have known about before.
The bottom line is that without luck, nobody on the Internet will know you are a dog.
The Scorecard
Par on an Average Par 4