Cutler's because it goes into every aspect of mercury toxicity and taking the reader through it. What it does to you, what areas it affects, the symptoms, what to take to help relieve symptoms, what to take to cure the problem and how to do it even if you are unable to find a professional in "reality" to help you. I found his book the best guide for me at the time I was poisoned and it got me well (at that time).

Huggins book is also great, but I found cutler's better and Cutler's protocol was the only one I could handle that was safe and rational. I personally feel both books are an asset, but again if I HAD to just have "one", it'd be cutler's hands down.