Much of the foundation of petrology was laid on the igneous rocks of the British Isles—one need only recall the Tertiary igneous rocks of northern Scotland. However, the relations between various occurrences of these igneous rocks (and in some cases even their locations) have remained obscure for many of us familiar with the British Isles only through the voluminous literature. This weighty and densely written tome will serve as a most useful guide and reference for all those interested in British igneous rocks. The volume specifically aims to continue that grand classic of observational geology, Ancient Volcanoes of Great Britain by Archibald Geikie. It does not achieve quite that level but will surely remain an indispensable general reference for many years if only because of its extensive bibliography.