Fourth, the book includes categories of psychiatric phenomena worthy of psychiatric research and examination. For example, one chapter discusses epidemic mental disorders. Among the topics covered are koro epidemics in Singapore, Thailand, India, and South China reported in the past several decades; a nervous twitching epidemic in Baltimore, Maryland, in 1939; mass hysteria in an Arab culture in 1997; and endemic hysteria in Malaysia in 1963. Also discussed is the collective suicide that took place in Jonestown, Guyana, in 1978. It is useful to be reminded that psychiatric phenomena can assume epidemic proportions, just as smallpox, anthrax, and cholera can, particularly in times of social unrest and rapid sociocultural change. I particularly found the discussion of culture-bound syndromes provocative and first-rate.