Joséphine
I loved the stories back then too, and can still see their charm today. There were other more memorable periods and locations in other books, but 1920s USA wasn’t too shabby in Calling the Shots either. I liked that Mel was separated from her friends for the first time and had to take care of a mission herself. The family she was placed with didn’t have it easy, so it made sense a guardian angel would be assigned to them.
Pretty sure this is also one of the first few works of fiction that I read as a child that shed light on racism and it’s impact, while also expressing indignation towards such bigotry.