im sure all Dr. Clark does is in good heart - but cancer is not caused by "human intestinal fluke" - cancer is caused by a mutation (an error) in a cells DNA sequence, which can happen for various reasons (for example - smoking and inherited gene defects). What happens is that the cell starts to reproduce with no limitation, and becomes "immortal". So in other words the cell multiplies again and again making millions of identical cells that dont die, causing various effects locally and troughout your body.
What ever you do, dont stop the medical treatment your doctor is recommending because he knows whats best for you. He´s not trying to poison you with chemo therapy, he´s doing the only thing successfully known to kill and hopefully control these immortal cells.
im not saying don´t buy the book because everything can help in some way or another.
never give up hope and i wish u all the very best