From the reviews:
"Schryens book basically contains his German habilitation dissertation. This work is a methodical analysis of the potential, limitations, advantages, and drawbacks of antispam measures. ... In summary, Schryen provides a comprehensive overview of the state of the art of the antispam field. An excellent work for those working in this field. Summing Up: Highly recommended. Faculty; researchers; professionals." (C. Tappert, CHOICE, Vol. 45 (6), 2008)
"This book investigates the problem of email spam . It is well written and important concepts are exhaustively outlined along with relevant code headers and sensible discussions. I was actually very impressed with the work here and once I started to delve into the contents of this book, I did discover a lot more about this field . a tour de force of anti-spam measures and I would hope that this book will become a bedtime read for researchers in the field." (Kevin Curran, Informer, Issue 26, Spring, 2008)
"This book reviews the history of spam, assesses the current situation and the economic significance of spam, analyzes current anti-spam measures, and proposes changes to the email infrastructure framework to address spam. Anyone frustrated by spam will find the book to be an excellent reference . The book is a timely review of the current state of spam email on the Internet. It contains thorough references, several appendices, and a good index." (David B. Henderson, ACM Computing Reviews, January, 2009)