Highly informative, and excellent introduction to the toxicity present in our environment. It's not the most comprehensive, as some of the things he suggests to intake has other environmental concerns (e.g., fish and mercury concerns; I obsessively look up mercury levels for fish, and some of the worst offenders that should be avoided include swordfish and Chilean sea bass; farm-raised fish have concerns with soil runoff from agricultural lands and so can have high levels of other things, etc. One also needs to be careful of kale, or any large-leaf vegetables, since if they grew along a highway, they have a tendency to pick up car pollutants from the air).
In any case, though, his list of things to eat are a useful starting point. However, it just needs one extra step of double checking how "clean" those foods are. Also, I highly recommend to check out the Consumer Report on brands of spices and herbs for heavy metal toxicity.
I also found his detoxification program a little too extreme. Basically, a fasting diet at the beginning. Not in the intermittent-fasting way either (which would induce autophagic processes, a garbage-cleanup mechanism in our body). I'm not sure how useful a near-total fasting diet would be, as many toxins tend to accumulate in, e.g., organ tissues, fat, and bone.
But despite some questions as to the efficacy of his step-by-step program at the end, overall it's a good read.