After more than a month of selling my book at cover price, Amazon.com is now selling The Tao of Network Security Monitoring: Beyond Intrusion Detection for $33.99, a 32% discount.
The US-based site still doesn't show as much information as Amazon.ca, where the table of contents and preface are posted. Barnes and Noble has the book for $1 more, and Bookpool is still the best buy with a 45% discount and $27.25 price.
The best place to get all of the information is the Addison-Wesley page. My TaoSecurity.com books page also hosts the errata for the first printing, the pcap files used in the book, and other information.