I don't know. It was on my reading list for a while because everyone always talks about it, but I did not actually find it that insightful. Some of these laws make sense, but some are absolutely mad. They might work in isolated instances, but not in the way the author implies them. Some are contradictory (e.g. make a lot of friends and don't make friends at all), and some might work but are just sad (always have someone to blame for your mistakes). I think this is more of a history book trying to explain what leaders of the past did, but it does not feel scientific. 
For a more contemporary read I recommend: Influence by Robert Cialdini.

I read the abridged version and I think it was totally fine, don't feel like I missed much and would have also not been able to finish the longer version I think.