The Freshwater Algal Flora of the British Isles: An Identification Guide to Freshwater and Terrestrial Algae. Edited by David M John, Brian A Whitton, and, Alan J Brook; CD‐ROM compiled by, Peter V York, David M John, and, Leslie R Johnson. Cambridge and New York: Cambridge University Press. $125.00. xii + 702 p; ill.; taxonomic and subject indexes. ISBN: 0–521–77051–3. [CD‐ROM included.] 2002. 2002.