I saw one review where the person said they stopped reading it because of the historical inaccuracies. It might be similar to the movie Gladiator, in that while it is historically accurate in some aspects, it is not suppose to be a history lesson, it was created for entertainment.
I think this book may be more Shindler's List than maybe something like Braveheart, as far as trying to stay true to history, but that is only my take on it after doing some quick searching on the google machine on my Internet thing. Not written to educate but written to entertain, with plenty of sex and violence.