Norman E Rosenthal M DNorman E. Rosenthal is a multi-talented writer, researcher and psychiatrist who has written ten books for the general public, some of which have become bestsellers. His latest book, Poetry Rx, was selected by the New York Times as one o the eight best books of the year in the wellness category. He is perhaps best known for first describing sea-sonal affective disorder (SAD) and pioneering the use of light therapy to treat it. He is currently a clinical professor of psychiatry at Georgetown University.