Anyway, perhaps a better approach is to label such books as 'unproven', 'pseudoscience', or even fiction, but continue to sell them. The idea of banning books because of their subject is a very slippery slope.
FWIW there are tons of other inaccurate, unproven, pseudoscience, or fiction books out there that are also damaging to public health. For example, any dieting book that promotes anything aside from caloric reduction for fat loss is basically fiction, and obesity is by far the largest public health crisis to face the USA with 80% of adults impacted. Would you recommend banning those books as well?