Some books that have been of great help and benefit for me.
1- The Practical Handbook of Plant Alchemy - Manfred M. Junius
2 - Alchemists Handbook - Manual for Practical Laboratory Alchemy - Frater Albertus
3 - The Weiser Concise Guide to Alchemy - Brian Cotnoir
4 - Alchemy and Metallic Medicines in Ayurveda - Vaidya Bhagwan Dash
1 - Have it, have not read it yet.
2 - Have it, read it, awesome book. I would put this book in the beginner/intermediate level.
3 - Have it, read it, another awesome book. I would put this in the beginner level. Background, history, etc are explained in this book that are not in the book by Frater Albertus.
4 - If you are looking for a challenge then this book is for you. This is a really awesome book and rare find, I had to special order it. If you want to order a copy I would suggest contacting Nataraj Books @ natarajbooks.com you can get the book for $20 plus shipping. This book also details how to create various gemstone elixirs/powders. This book was difficult for me on a few counts. It was the first real book on alchemy I ever had and it is not a beginner book in my opinion, but has a LOT of really good info. On another count it was because the book is completely based on Indian/Yogic philosophy, part of which I have no issue with as I have studied yoga and vedanta philosophy for a number of years. That said there was still an up hill battle with some of the terminology even though it was written in english. CAUTION: This is a real caution not a caution to peek curiosity. There are preparations in this book that discuss the use and distillation of mercury. Unless you have the experience of such things, I would not attempt until such time as you do, or have an appropriate teacher.
Additional note on reading materials. For those wanting a structured "course" on the esoteric arts, kabbalah, alchemy, etc. I would suggest getting a copy of Triad Publishing course material on CD. I'm currently in the process of reading the material myself and can not really comment on it at this time, however if comes highly recommended.
http://www.triad-publishing.com/
CD Contents:
The Esoterics course of 12 lessons,
The Spagyrics course of 48 lessons,
The Mineral Alchemy course of 84 lessons,
The Qabala course of 72 lessons,
and as an added bonus, the 4-volume set of research papers on the Acetate Path, which include much of the relevant historical literature from Edward Kelly, Ripley, Weidenfeld, Becker, Hollandus and numerous others, and a previously unpublished paper by modern alchemist Robert Bartlett.
Enjoy,
Steven Magus