According to Whedonesque, Titan Books is shipping the second Firefly Companion and you should start seeing them at Amazon and other bookstores soon.
The book “has now started shipping from our US distributors, and will be hitting our UK warehouse next week, so Amazon orders should be with people shortly, and the book will be in bookstores in the next couple of weeks”.
Some comics shops got it faster than that, but now the rest of us will get to grab a copy.
32 pages bigger than the first book, the second Companion will have the rest of the original shooting scripts (which are not the same as the Firefly scripts available in many places online), interviews with cast, crew, and Whedon, screen shots, behind-the-scenes pictures, and close-up shots of props (including Vera!) and even a section on the fandom. The first Firefly Companion was just what we were hoping for, and this looks to be more of the same.
Order it at Amazon US, Amazon Canada, or Amazon UK. And don’t forget to get Firefly Companion Vol. 1 and Titan’s excellent Serenity Companion.