Syngress Publishing has published a book on Ethereal called Ethereal Packet Sniffing. It is written by Angela Orebaugh, an expert in network security, and three Ethereal developers: Greg Morris, Ed Warnicke, and Gilbert Ramirez.
The book explains how to install Ethereal, how to use Ethereal, for both beginners and advanced users, and how to develop protocol dissectors for Ethereal. Ethereal Packet Sniffing includes a CD-ROM with Ethereal source code and binary packages, sample packet captures that go along with the text of the book, and HTML files that provide information on all the display filter fields that Ethereal knows about.
Table of Contents
Excerpts from the book are available at the Publications link on the Ethereal web site.