Not exactly the deepest book on the subject imaginable, but it has plenty of great photographs, and does a pretty good job covering the different eras of tank development equitably (1914-1939, WWII, and the Cold War each receive about the same number of pages). Also covers vehicles such as assault guns, armored cars, scout cars, counterinsurgency vehicles, etc. Also, some interesting "how it works" material in the back for us tank newbies. It even comes with two color prints (I got the M3A1 and StuG III). Not bad for $18!