Quiet

Maybe you lack the instinct for self-promotion. Maybe you can’t muster your employer’s rah-rah-rah-sis-boom-bah attitude. Maybe you’d rather stay home and read a novel instead of going out to the party of the year. So? Something’s the matter with you, and you should feel ashamed, right?

Wrong, says Susan Cain, author of Quiet, a vigorous,…