You don't need to go to fiction to find toxic books. Paris green(https://en.wikipedia.org/wiki/Paris_green#Uses https://en.wikipedia.org/wiki/Paris_green#Uses)

You don't need to go to fiction to find toxic books. Paris green(https://en.wikipedia.org/wiki/Paris_green#Uses https://en.wikipedia.org/wiki/Paris_green#Uses) was at one time used heavily in a large number of seemingly innocuous applications, including book covers. https://theconversation.com/how-we-discovered-three-poisonous-books-in-our-university-library-98358 https://theconversation.com/how-we-discovered-three-poisonou...