I've long had a passing interest in toxicology, and I originally bought this book as a research tool for a fictional endeavour. It turns out that it's absolutely fascinating. Beginning with an explanation of what constitutes poison, and where it may be found (marine animals, plants, minerals etc.), the book then goes on to detail examples of poison in its different uses. Poison as Executioner, Assassin, Saviour and even Medicine are all covered. The author also includes flash pages of the more famous poisons, such as belladonna, strychnine and antimony, including the lethal dose required, any known antidote, where it is found and what its symptoms are, as well as famous victims.
It's incredibly up to date, as well as being interesting, and is interesting not only as a research tool for writers, it's also fascinating for its social history as well. On top of that, it's a very attractive book, with interesting typography and a tidy lay out. It also features coloured flash pages and beautiful illustrations or small photos of the victims and poisons in question.