The Wars of the Roses by Martin J Dougherty is an informative overview of this tumultuous and pivotal period.
This is not, nor do I think it intended to be, an exhaustive history of the period. There are many excellent books on the details and the rationales behind the various machinations. What this book offers, and where it succeeds, is an outline of what happened fleshed out with general explanations of reasons as well as some general background to the culture and norms of the time. If you thought a book just over 200 pages was going to go into detail about every nuance, every player in the many conflicts that took place over about a thirty plus year span, well, I don't know what to say. That expectation is unreasonable and I think, based on the complaints I saw, disingenuous. Even the family trees are accurate, can't help some don't know how to read when a person is made a ward of a person and thus, while not blood, is indeed a branch spliced onto that tree. So much for "untrained" librarians.
While the bibliography is not extensive, anyone wanting to know more can certainly start with what is there and, armed with the information in the book, find plenty of academic works that delve more deeply into whatever aspect interests them. As for the GOT connection, if that is the main reason for reading or your only point of comparison, well, remember, this was just one of Martin's influences for the works, no one is trying to "usurp" anything. Take a pill of chill.
I would recommend this to readers who have little to no knowledge of the period, which includes those with only a GOT connection. Those who studied this in school will probably enjoy the recap but likely won't learn a whole lot new. It is, however, an accessible and pleasant read so worth the time.
Reviewed from a copy made available by the publisher via NetGalley.