Zarrella's Hierarchy of Contagiousness: The Science, Design, and Engineering of Contagious Ideas [Kindle Edition]
is the latest book in the Domino Project series for Bzz Agents. Is an interesting read about the ins and outs of the world of blog, twitter and facebook. Zarella takes the time to discuss his different experiments over the years that have helped him to distinguish what really can make a tweet, blog post or facebook status stand out. Additonally Zarella spends a fair amout of time discussing marketing strategy in business.
One thing that really stood out to me was the statement "We assume that people who make choices before we do have more information that we do, so we imitate." Basically, Zarella gives several statements to be considered, but also gives the encouragement that a large part of it is arbitrary.
You can download this free from amazon right now!