the two best books I have found on nutrition are: Anti Cancer by David Servan-Schreiber (himself a cancer survivor) and Foods that Fight Cancer by Richard Beliveau and Denis Gingras. The first one has a website, the second book probably does.
My husband was diagnosed with stage 4 colon cancer last year, age 51, and we use a lot of the info in these books, and he breezed through chemo and is doing very well. Plus the tumours in his liver are shrinking. Does the food help? I don't know but at least we are doing something and the research on food and how it can help fight cancer seems worth listening too. Good luck!