Five book reviews in the May 2002 issue of Notes and Records. Andrew Wear, Knowledge and practice in English medicine, 1550-1680. The letters of Sir Joseph Banks: a selection, 1768-1820, edited by Neil Chambers. Gillian Cookson and Colin Hempstead, Fleeming Jenkin and the birth of electrical engineering. Edna Healey, Emma Darwin: the inspirational wife of a genius. Michael Bliss, William Osler: a life in medicine.