The four: who are these companies and why write about them? -- Amazon: how Amazon became the most disruptive firm in the largest economy -- Apple: tech goes luxury -- Facebook: love is key to longevity--and great advertising -- Google: our modern-day god -- Lie to me: the Four and funny business -- Business and the body: all businesses appeal to one of three organs -- The T algorithm: what it takes to get to a trillion -- The fifth horseman?: who will be next? -- The Four and you: follow your talent, not your passion -- After the horsemen: where are the Four taking us?.