S.  Cham, Field Guide to the Larvae and Exuviae of British Dragonflies: Damselflies (Zgypotera) and Dragonflies (Anisoptera). British Dragonfly Society, 2012, p. 152pp.

S.  Cham, Nelson, B., Parr, A., Prentice, S., Smallshire, D., and Taylor, P., Atlas of Dragonflies in Britain and Ireland. Field Studies Council for the Biological Records Centre, Centre for Ecology & Hydrology, with the British Dragonfly Society, 2014, p. 280pp.