He wanted to be killed off in the second season I think..it was his idea, I think he just thought it'd be a good idea...that's what I heard anyways. Serenity was amazing....I cried and laughed a ton of times even though I was accidently spoiled about the deaths....and I think we did find out who Book was...I think he was a mix of a bounty hunter and the assassin in the movie. And technically Mal/Inara did kiss...but I know what you mean...at least Kaylee and Simon did though!! :D