My comment was not on the book, only on the "news" article.
History Books are only written by the victors. The losers aren't interested in promoting their loss.
For the most part Anglo-American relations are on good terms, but you would never think it possible if you studied the history works of the two nations. My U.K. book decries the revolt of the colonies, and the dishonourable actions of those subjects of the Crown. My U.S. book celebrates the vanquish of the Crown on certain battlefields by the "Patriots". Both are intended to evoke the glory of the side it is written for.