Those are the Other "Green Books".
If you'd ever seen them, you'd know The Green Books.
They take up an impressive swath of a normal library book stack.
Oh, THOSE “Green” books. I’ve read some that were part of the US Army series, including the one about the breakout from Normandy (”Breakout”) and the one about Stilwell in China. They weren’t “Green,” as the original series was, but were later productions.
Do you have the original “Green” series? You have a great treasure if you do.