Monoamine Oxidase Inhibitors: The State of the Art. Edited by M. B. H. Youdim and E. S. Paykel. Chichester: John Wiley. 1981. Pp 214. £13.00. - Psychotropic Drugs: Plasma Concentration and Clinical Response. Edited by Graham D. Burrows and Trevor R. Norman. New York: Marcel Dekker. 1981. Pp 528. S.Fr. 150.