I love me a bit of Bond and I am currently working my way through John Pearson's 1973 book The Authorised Biography of James Bond. It takes the conceit that Bond was real, knew Ian Fleming and that his adventures were published to make the enemy think he was too fantastical to be real.
Not all the way through yet but it's fun with Pearson weaving in bits of Fleming's life with Bond's and he has a good sense of the action of Bond as well as the attention to details that Fleming adored. As a meta-history it's a lot of fun.
And references to people called Oberhauser and Da Silva would suggest that I am not the only one who has read this book....