Weir's book is pretty much the the conventional accepted history. The kind of thing you would have learned in the UK 30 yrs ago for "O" and "A" Levels in School. The characters are conventional sterotypes, there is little reference to recent more interesting scholarship, and a lack of undertsnding of just how different pre-modern dynastic families saw the world. It does do a good job on sorting out the event but there is so much more that could have been said that could really have brought this to life. To get a feel for the period try the (admittedly partisan) "Bosworth: The Psychology of a Battle" by Micheal Jones.