The World Encyclopedia of Tanks and Armoured Fighting Vehicles by George Forty and Jack Livesey, Lorenz Books, 2010.

Not strictly a modellers volume but its over 600 pages are crammed with glossy photographs of tanks and AFV's (over 400 vehicles in total)from their early origins up to the present day. Good technical info is given on each typeas well as a brief history of the tank and its variants.

George Forty's books are always well-worth getting; he served for 32 years in the Royal Tank Regiment, and in 1981was appointed Curator of the Tank Museum here in Bovington, Dorset. He knows his stuff!