Warblers of Europe, Asia and North Africa.

London: Helm, 1997.
Octavo, dustwrapper, 360 pp. 48 colour plates, 145 maps.

Many warblers are notoriously difficult to identify in the field (and even in the hand) and, until now, there has been no definitive guide to the species of these regions.
One hundred and forty-five species (and all their races) are described in detail, covering all aspects of identification. As with other books in the Helm Identification Guides series, the treatment is exhaustive, with text including sections on moult, voice, habitat and behaviour, distribution and measurements. All species (and many races) are illustrated within the 48 colour plates, and there is also a colour distribution map for each species, with a wealth of line drawings complementing the text.