Looks like astroturf is alive and well on Amazon. Check out the customer reviews for Charles Perkin’s Ad Hoc Networking. Notice the multiple slams, all 40-column formatted, all saying about the same thing, all written at about the same (low) level of literacy. Looks like someone has a real axe to grind, or maybe a competing book to hype, and doesn’t let little things like ethics stand in their way.