Paul Ekman Unmasking The Face. A guide to recognizing emotions from facial clue

Ekmanisaleadingauthorityonthestudyofthefacialexpressionsandtheirrelationtoemotion,andthisbookisamethodicalandthorough(forthelayperson,atleast)introductiontothefield,withspecialfocusonrecognizingwhathecallsthesixbasicuniversallyexpressedemotions:happine