Hi Fred,
Here are a few books I have that are full of details and stats and good photos of all sorts of tanks.
British and American Tanks of WWII The complete illustrated history of British, American and Commonwealth tanks, 1939-1945 by Peter Chamberlain and Chris Ellis ISBN:0-668-04304-0
Encyclopedia of German Tanks of WWII, The complete illustrated directory of German battle tanks, Armoured Cars, SP Guns and semi tracked vehicles 1933-1945. By Peter Chamberlain and Hilary Doyle.
ISBN:1-85409-518-8
Tanks of the World 1915 -1945 By Peter Chamberlain and Chris Ellis.
ISBN: 0-304-36141-0
I have others if you want information on more modern tanks jsut let me know if you want Soviet or NATO/US or world wide.
These books are all good but if you want a lot of details on a specific vehicle then the way to go is the Osprey books.
Hope this helps
Dave