de Gruchy's Clinical Haematology in Medical Practice. Edited by F. Firkin, C. Chesterman, D. Penington, B. Rush, Blackwell Scientific Publications, Oxford 1989. 672 pages. Price£34.50 (hardback)5-Hydroxytryptamine in Psychiatry. Edited by M. Sandler, A. Coppen, S Harnett, Oxford University Press 1991. 349 pages. Price£35.00 (hardback)Platelets and Atherosclerosis. Edited by C. Kessler, Springer-Verlag, Heidelberg, 1991. 110 pages. Price DM 78.00