A memoir of a DEA agent stationed in Central america in the 1980s, who discovered the CIA's involvement with drug smugglers as his attempts to bust them were blocked by his superiors.

I prefer to read about this topic (Contra-cocaine connection) from a single narrative perspective, and found this book compelling. The author does not paint himself as a hero, which adds complexity. He was trying to do a job (locking up dopers) he actually wasn't supposed to succeed at.  By which I mean, the war on drugs hurts American citizens, even star undercover drug-hating DEA agents who try to bust dangerous criminals who are actually protected CIA assets.