Thailand's authorities recently closed an investigation on the most notorious serial killer in the country's history: Sararat Rangsiwuthaporn, commonly called "Am Cyanide," poisoned more than 14 people in a murder spree that left local police baffled -- until they learned the full story.

They don't want you to read our book.: https://static.macmillan.com/static/fib/stuff-you-should-read/

See omnystudio.com/listener for privacy information.