You can find the book on Amazon for about $30. Well worth the price if you're a fan of the show. Sadly no new extras on the 15th anniversary edition other then packaging and whatnot.
<em>Firefly: A Celebration</em> is a book with all the scripts along with a collection of anecdotes, pictures, interviews, and a couple short stories.
There's the 1:400 scale model of Serenity at QMx, ThinkGeek, and Amazon, but it's pretty expensive.
There's also the key chain model of Serenity, also available at QMx, ThinkGeek, and Amazon.
If neither of you already have it, you might want to consider getting the DVD or Blu-Ray versions if you like commentaries or the special features (though, much of the latter have been re-uploaded to YouTube). Same goes for the official soundtracks (Firefly & Serenity).
Well, i got mine of amazon
It has all the scripts. Character write ups. Prop stuff. Lots of pictures. Shit it even has some of the money
Firefly: a Celebration Anniversary Edition. It's this book here.
Yep. I read them too damn fast and I was again left with that empty lonely feeling. Now I've only got this left to thumb through.
http://www.amazon.com/Firefly-A-Celebration-Anniversary-Edition/dp/1781161682
http://firefly.wikia.com/wiki/Hoban_Washburne
Down in the behind the scenes section it says at a comic con joss confirmed Wash would still be alive if the show hadn't been cancelled.
However i believe I read it in my copy of this book:
https://www.amazon.com/Firefly-Celebration-Anniversary-Joss-Whedon/dp/1781161682