From the dates, it seems to me that the Tomlinson Hill documentary was created first (2012) and that the book followed after (2014) - although the author must have been researching both simultaneously. If you saw the documentary, how did it compare to the book? If you didn't see it, are you planning to now that you've read the book? What do you think of having books based on documentaries & vice versa - do they compliment each other, or is one always better?