David Pearson & Peter Kennerley 
Reed and Bush Warblers [PDF ebook] 

This detailed and comprehensive identification guide follows in the mould of Sylvia Warblers and Pipits and Wagtails. It primarily covers the genera Acrocephalus, Locustella, Cettia and Bradypterus, together with a few smaller related genera. To the uninitiated, theseare the archetypal ‘little brown jobs’ and as if they weren’t hardenough to identify anyway, many of them are hard to see as well! Thisauthoritative handbook covers their identification in breathtakingdetail, illustrated with line drawings, sonograms, wonderful colourplates and photographs. It is destined to become the ultimate referencefor these challenging birds.