Firepower, by R.P Hunnicutt.

This isn't a wot console news post but posting it regardless as i wouldn't want any of you missing out if you're into doing tank research etc. It seems this book is typically very rare and expensive (until now, cost thousands of dollars for a new copy) so this may be a good deal for those interested: 

Firepower, history of the US heavy tank by Hunnicutt