This book is an excellent brief introduction to the three battles of 1066 and to 'The Big Three'(the author's term) who fought them: Harold Godwinson, Harald Hardrada and William of Normandy.
The book is well illustrated (in black and white) with clear maps and an index. It's hard to see how more information could have been squeezed into the pages. For example there are sections on the contrasting arms, armour and military organisation of the Vikings, Saxons and Normans as well as detailed coverage of the context of the political struggle following the death of Edward the Confessor.
It's particularly good on the first and least known of the battles at Fulford just outside York.