PCR. M. J. McPherson and S. G. Møller. BIOS Scientific Publishers, Oxford. 2000. Pp. 288. Price £22.95, paperback. ISBN 1 85996 017 0.

The Horizontal Gene Pool — Bacterial Plasmids and Gene Spread. Christopher M. Thomas (ed.). Harwood Academic Publishers, Amsterdam. 2000. Pp. 419. Price £69.00, hardback. ISBN 90 5702 462 4.

The Century of the Gene. Evelyn Fox Keller. Harvard University Press, Cambridge, MS. 2000. Pp. 186. Price £15.95, hardback. ISBN 0 674 00372 1.