He wrote a good book and it was quite interesting. He did not put anything in his book that's not already known, nor was his book a rah, rah look at me I'm awesome. I feel really bad for his family, brother and the friend's family. Chris Lyle was conducting some type of charity event for Marines with PTSD. Lyle's brother was or he still might be in the Corps. Some POS killed him and the friend. Nothing too complicated about that or putting yourself out there - IMO. I don't know if this was some type of therapy event, but the only thing I would question is mixing PTSD and firearms.