Booklist - British/Commonwealth Military Vehicles.

If you want technical histories, P. M. Knight has done four very detailed volumes on the Covenanter, Crusader, Challenger, and Comet. Self-published through Lulu.com Search Results - Lulu.com

And Canadian Roger Lucy has written "Canada's Pride - the Ram Tank and its Variants" which I reckon covers everything there is to know about the Ram. Expensive, but it's a pretty big hardcover.
Canada’s Pride – the Ram Tank and its Variants

 

OK here's something else I turned up although I'm not sure how technical it is. Peter Beale (who also wrote a book about 9 RTR) wrote a book called Fallen Sentinel about the Australian cruiser tank program.

And he also wrote one about British tanks called (ugh) Death By Design (1998) which was mentioned earlier.

Whether these are GOOD or not I do not know.

 

Peter Beale served in 9 RTR and has a very firm point of view. I corresponded with him some years ago. He also wrote about his time in 9RTR. It has some useful information.
Tank Tracks: 9th Battalion Royal Tank Regiment at War 1940-45

 

SInce this thread started there is also -

Sherman Crab Flail Tank, David Fletcher, ISBN978-1-84603-084-0
Crusader and Covenanter Tanks 1939-1945, David Fletcher, ISBN 978-1-85532-512-8
British Battle Tanks: British-made tanks of World War II, David Fletcher, ISBN 978-1-47282-003-7
British Battle Tanks: American-made tanks of World War II, David Fletcher, ISBN 978-1-47282-006-8
Soviet Lend-Lease Tanks of World War II, Steven J. Zaloga, ISBN 978-1-47281-813-3
Churchill Tanks: British Army, North-West Europe 1944-45, Dennis Oliver, ISBN 978-1-52671-088-8

 

If the links below are specific to the UK site, it might be better to go to www.lulu.com, let it regionalise itself and then search for:

Mechanized and Armoured Formations 1929

Modern Formations 1931