This book not only contains very poor research, but outright lies that are easily checked and confirmed. This is not a scholarly or educational work, but simply a vindicative collection of unsubstantiated accusations against people the authors happen not to like.
The book is also anti-science, denying the findings of Harvard university concerning the Ancient North Eurasian population and its genetic influence on Native Americans and Europeans, and trying to term this research "Ariosophy" with which it, in fact, has no relation. The book also describes a video on the subject of Anglo-Saxon Christian poetry as "anti-Semitic" and "ariosophist" because it refers to translations of the Old Testament that include Hebrew characters.
It should be a source of immense shame for the publishers to be attached in any way to such a poor piece of work and the book should be derided for the terrible, disreputable dross it is.