Paperback, epub, and for the Kindle.
There are new versions of both Bechamp books. Both are available as paperback, epub and on the Kindle.
Bechamp or Pasteur?
This book by Ethel Hume is the best introduction around to the science of Antoine Bechamp, and his relationship with Louis Pasteur. There is an element of the scientific detective story here.
Also read The Cult of the Microbe by Ethel Hume, from the main part of the book.
There is also this general article introducing the concept of pleomorphism.
The Blood and its Third Element
This is the last work written by Antoine Bechamp himself, and is his final statement of his theories. It contains detailed accounts of his most important experiments. This is a more scientific read than Hume’s book.
Read Bechamp’s preface to the book here.
Also, read Notes on the Coaulation of the Blood, an extract from the book.