Spam Nation: The Inside Story of Organized Cybercrime-from Global Epidemic to Your Front Door, by Brian Krebs.
I actually haven’t read the book yet. (It is at the top of the pile.) But Krebs did a signing here in Austin last night, and he came across as a really nice affable guy. I didn’t get a chance to talk with him much: I’d estimate there were 150 people there for the signing, many of whom were purchasing multiple copies of the book, so time was limited. But he signed everyone’s book, and even posed for photos with those who wanted, and in general it was just a swell experience. Based on that, I have few qualms about recommending that you purchase the book.