Infectious madness: the surprising science of how we "catch" mental illness

Germ theory redux : the acquisition of mental illness

The fetus as battleground : early exposure and psychiatric fate

Growing pains : "catching" anorexia, obsessive-compulsive disorder, and Tourette's

Gut feelings : the brain in your belly

Microbial culture : pathogens and the shaping of societies

Winning at evolutionary chess : strategies to outwit pathogens

Tropical madness : infection and neglect in the developing world.