After hearing a recommendation for the book Groundswell at Blogworld and then getting another recommendation from a friend, I just went over to Amazon and bought the thing. When I buy products from Amazon, I always look at the user reviews. The only reviews I read are the 1 star reviews. I look for common themes in the 1 star reviews where people are really unhappy with the product. If there is a theme, I decide whether or not I can live with that flaw.
How do you buy from Amazon?
Groundswell, by the way, has 39 reviews. 29 5 stars, 9 4 stars and 1 3 star review. There are no bad reviews for it.