Since I started putting my book reviews on Rat's Reading a year or so ago, I've stopped plugging the books here. However, I just finished reading Bruce Schneier's Beyond Fear, which I highly suggest folks go read. If you don't want to spend the $25 cover price (or whatever it's discounted to at major retailers), at least read his blog regularly. If the sorts of things the Bush administration is doing in the name of security tend to incense you like they do me, this book will give you a framework to understand how these things actually impact security (if at all), and give you ammunition against the emotional arguments the right wing uses.
Anyway, the review of Beyond Fear is up at Rat's Reading now. Go read it to get an idea.