Drugs like fentanyl, K2, and Spice--and those with arcane acronyms like 25i-NBOMe--were originally conceived in legitimate laboratories for proper scientific and medicinal purposes. Their formulas were then hijacked and manufactured by rogue chemists, largely in China. Westhoff has infiltrated this shadowy world. He chronicles the lives of addicted users and dealers, families of victims, law-enforcement officers, and underground drug-awareness organizers in the US and Europe.