Jack Schafer

Spent a career in FBI counterintelligence recruiting foreign agents, which is a job that consists almost entirely of getting strangers to like and eventually trust you.

The Like Switch turns that into a method: proximity, frequency, duration and intensity as the raw ingredients of rapport, plus eyebrow flashes, head tilts and the deliberate use of curiosity rather than questions.

Schafer is candid that the techniques are the same whether the goal is friendship or recruitment, which is either a useful honesty or a reason to be careful, depending on the reader.