Thanks, RJ. So it's the third book in the list of books that Mcmasters review. That review is even more scathing although written very diplomatically.
For folks without access to JSTOR, the book that questions Pocahontas' origins is Pocahontas: Medicine Woman, Spy, Entrepreneur, Diplomat, by Paula Gunn Allen. As the reviewer points out, Allen's work draws not from any historical documentation but oral tradition of mostly the Algonquin, not the tribal traditions of the Native Americans that originated in Virginia. She also makes many other claims about Pocahontas that are not at all supported by any historical evidence even claiming that P was assassinated by her husband. Most researchers of history and genealogy are going to have great difficulty accepting anything from this book.
Helen Rountree, on the other hand, is highly respected and trusted.