Knife Laws of the Fifty States -- A Guide for the Law-Abiding Traveler is available online at any of these fine booksellers (note that each retailer sets its own price):
Amazon.com
A.G. Russell Knives
Barnes & Noble
Bloomfield Press (Gunlaws.com)
NRA Store.com
AuthorHouse.com
... and other online discount bookstores.
The book can also be ordered through your local Borders or other local bookstores.
Title: Knife Laws of the Fifty States -- A Guide for the Law-Abiding Traveler
Author: David Wong, Esq.
ISBN-10: 1-4259-5092-2
ISBN-13: 978-1425950927