Head is framing his discussion of Hereward the Wake, the Saxon hero of the Lincolnshire fens, around an argument made in a book by a General Harward that he is the descendant of Hereward, and discussing Hereward's career and impact on history. The argument against General Harward got a little tiresome at times. Head also wrote about Kingsley's novel and other Victorian interpretations of the Hereward legend and his connection to the genesis of Robin Hood. He overlooks however, the Waverly novel written by Sir Walter Scott called Count Robert of Paris. The Scott novel sounds fascinating since he places Hereward in the Varangian Guard during his time of exile and places him in a story with Bohemond.
The Victor Head book is an excellent starting place for anyone who wants to know more about Hereward and cannot read Latin, Old English or Old French. What it lacks is the author's best guess for a reconstruction of Hereward's life and the evidence for it.
It is not light reading either. It is a book for when you really want to know just the facts.