By Hal Abelson, Ken Ledeen, and Harry Lewis, Addison Wesley, c 2008, 366 pages

This very readable book examines the issues of privacy and data security. The primary focus of the book is on the data content of the Internet; however, radio and other data modes in the radio frequency spectrum are examined briefly. Except for some brief examples of old¬fashion cryptography, technical details are presented in simple and lay terms.

This book provides a very level-headed factual approach. It provides a surprisingly calm approach, noting such matters as the fact that most email is not encrypted, and clearly pointing out that most users don't seem to care. The book attempts to examine the psychology and sociology of why we willingly live in a data-insecure world. Now that the book is 3 years old, it is possible that it is missing some issues regarding newer developments in Internet content and matters like location tracking. I enjoyed the book.