One can never go wrong with Frater Acher writings. The books starts out with the Germanic history of blades used in sorcery. What is nice about Frater Acher's writings, is that they provide reference and sources for where their information is coming from. This is nice as it adds some legitimacy for some people who may need that. It also adds some historical content for how the knife and its usage was perceived by the Germanic peoples of the past. The second part is also historical, but in the context of non Germanic people, and how they related to blade and its manufacture.
Overall this book was informative, but nothing that was mind blowing. My main concern with this book is the price. My philosophy around book buying is that books that cost more than a dollar per page are books that don't make it on the self, unless it is really wanted. This book is 77 pages and has a cost of $65. This is a newly published book and its price is almost out of my price range philosophy. It isn't a cloth covered book, but it does have some nice foil work on the cover.
A person could live their magical life without this knowledge in this book and still excel in the use of magical blades. So the price is a bit high for the amount of content that a person receives, and the quality doesn't match the price in this persons opinion.
Would I recommend this book? Yes, but the information isn't essential information, more like, add on information to give a person historical context of the use of blades and how to make them.