...On Amazon in both print and Kindle versions. Besides the inevitable edits and corrections (It's like they breed when I'm not looking sometimes.) I have improved some of the existing photos and added sections about dealing with vehicle-based attacks, blade attacks, and added sections about fighting without a gun and a discussion of vehicle-based guns aka truck/car guns.
I think I'm the only author that does these kinds of new editions.
Search on Amazon for CR Williams to find this and other books I've written.