Trekking in Russia and Central Asia
by Frith Maier
(Reviews of this book available at amazon.com)

Central Asia (2nd Edition)
by Giles Whittell

Russian Far East
by Erik Azulay & Allegra Harris Azulay

Russia, Ukraine and Belarus
(Lonely Planet Travel Survival Kit)
by Nebesky, Noble, Wesley & Selby

Siberian Dawn: A Journey Across the New Russia
by Jeffrey Tayler
(Reviews of this book available at amazon.com)

Silk Route by Rail
by Dominic Streatfield-James

Trans Siberia Handbook
by Bryn Thomas
(Reviews of this book available at amazon.com)