I think this book is something that is not for everyone but very special.
It contains not much direct gameable content but more a world artifact which in detail describes how to actually conduct alchemy in a fantasy setting which is way more 'immerisve' then I am used to seeing in these kind of books.
I dislike the lack of bookmarks in the pdf as it makes navigating this behemoth of a book quite hard before you know where the stuff is that you need.
Overall this is more a historic fantasy book then a gaming supplement but that can be a upside and a downside depending on what you are looking for.
[4 of 5 Stars!]