I would personally have to go with SS on this one. The Amalgam Illness, diagnosis and treatment is the first book I would get because it's truly the foundation. The rest that come on top of that I'd call helpful additions.

There is no way I'd be without that book, that is what went into the entire mercury poisoning problem in its entirety, everything from symptoms, conflicting problems that often coincide, other toxicities, ways to diagnose, how to chelate SAFELY, what to take for this condition, how to begin, the whole procedures are laid out. Even showing how to do a challenge test to test for mercury. The symptoms from the test alone can apparently be a diagnosis almost in itself.