The fourth book in the series picks up fourteen years after the third (How Speleology Restored My Sex Drive). Max and Sally Brown are comfortably ensconced in Geneva and both are wondering if their lives of comfort and privilege don’t require they make a contribution. They find token employment with the CIA. This converts to an assignment to uncover the source of counterfeit anti-malarial drugs in Southeast Asia. Unprepared, and overly zealous, their every effort seems to result in the death of a friend or acquaintance. The trail leads to remnants of the Khmers Rouges – the quintessence of evil – in western Cambodia. The battle is waged on elephant back, in Cambodian minefields, a Thai brothel, and in the Khmers Rouges’ stronghold. Sally is wounded and Max is forced to carry on alone. He discovers an unwelcome locus of evil: within himself.