Birds of Central Asia (Helm Field Guides) [Paperback]
Manuel Schweizer et al: Buy from Amazon.com or Amazon.co.uk

• Birds of Central Asia is the first field guide to include the former Soviet republics of Kazakhstan, Kirghizstan, Turkmenistan, Uzbekistan and Tajikistan, along with neighbouring Afghanistan. This vast area includes a diverse variety of habitats, and the avifauna is similarly broad, from sandgrouse, ground jays and larks on the vast steppe and semi-desert to a broad range of raptors, and from woodland species such as warblers and nuthatches to a suite of montane species, such as snowcocks, accentors and snowfinches.
  

Birds of East Asia (Helm Field Guides), Eastern China, Taiwan, Korea, Japan, Eastern Russia.
Mark Brazil: Buy from Amazon.com or Amazon.co.uk

• This is the first single volume guide devoted to the eastern Asian avifauna. Birds endemic to this region include representatives of many of the major families, from the world's largest eagle - Steller's Sea Eagle - to the tiny Formosan Firecrest. The guide features the most up-to-date text available, which, in conjunction with extensive colour plates throughout, facilitates the field identification of all of the species known from the region. Colour distribution maps enhance the text by providing a visual analysis of the summer, winter and migratory ranges of all species.
  

Collins Bird Guide
Lars Svensson et al: Buy from Amazon.com or Amazon.co.uk

• Europe's best Field guide. If you only carry one field guide on a trip into Europe then this should be it. It provides all the information needed to identify any species at any time of the year, with detailed text on size, habitat, range, identification and voice. Accompanying every species entry is a distribution map and numerous illustrations to show the species in all the major plumages (male, female, immature, in flight, at rest, feeding, etc).

The Complete Guide to the Birdlife of Britain & Europe
Rob Hume, Peter Hayman (Illustrator): Buy from Amazon.co.uk

• This is quite simply the best illustrated guide to Europe's birds that I have seen. Every bird is pictured at least five times (and sometimes twenty times) in varying poses within its habitat. Seeing the birds in context, really gives this book the edge.
  More than a field guide, the book is coffee table size, and certainly deserves to be in the collection of every serious bird watcher.

Where to Watch Birds in Europe and Russia
Nigel Wheatley: Buy from Amazon.co.uk

• Over 250 major sites are treated in this book, and many more in passing from Iceland across Europe through Georgia to Ussuriland in southeast Russia. Countries, archipelagos and islands are treated alphabetically, the introduction to each being accompanied by a map showing major routes and the distribution of sites. Each site account lists the birds to be seen and how and where to find them, particularly the specialities

Lonely Planet Eastern Europe
David Stanley: Buy from Amazon.com or Amazon.co.uk

• This book is not as detailed as the individual Lonely Planet country guides but certainly very useful (and better value) if you are interested in visiting more than one country in the region. I have used it quite often and have not yet been disappointed. A definite improvement on the previous edition.