These books sound like they're pushing type of pop psychology that the article says is bunk. From the article:

  When someone is lying, he looks up and to the side, 
  as if searching for something. A liar fidgets and 
  seems somehow nervous. Sometimes, he’ll scratch or 
  pull his ear. He’ll hesitate, as if he’s not sure 
  he wants to tell you something. These, however, are
  all “old wives’ tales,” Leanne ten Brinke, a 
  psychologist at the University of California at 
  Berkeley whose work focuses on detecting deception, 
  told me. “The empirical literature just doesn’t 
  bear that out.”