The Life and Doctrines of Jacob Boehme, by noted occultist and theosophist Franz Hartmann, was originally published in 1891, and is an anthology of the writings of the German Christian mystic Jacob Boehme. Hartmann lays out much of Boehme's complex mystical concepts and thought, and this work acts as an excellent reference book for students of Boehme.
It's a good and precious collection of sentences from all works of Bohme. However I must stress the errors of the comments of Hartmann, it's best to stay away from the doctrines of the teosophical school. I personally avoid the commentary and only focus on the actual quotes from Bohme.
I read the kindle version of this book some time ago and have reviewed it several times. This is clearly the best spiritual book that I have read. The book discusses the trinity, creation, man and other areas in very clear terms. I found this book very inspirational and the desire and need to re-read this book due to the difficult subject matter. In closing, although Jacob Boehme was a Christian Mystic, this is a book for people of all religions.