>>2703408Girls und Panzer? There's quite a lot of them, and they are all pretty good. It gives quite a bit of worldbuilding, as well as more light to the various minor characters in the series. Right now I'm reading Ribbon Warrior, it has a completely different feeling from the original, since the characters are taking part in an unofficial, underground form of their "sport", with less regulations. Also no "we need to save our school" kind of motivations, they are just fighting for fun and glory.
If you liked the anime but you didn't saw the movie, I recommend it as well, it's pretty good.