The Trouble with Angels

Aka “Life With Mother Superior” - this is the book that the Hayley Mills “The Trouble With Angels” is based on. Was surprised how much of the book made it into the movie. Shockingly dated at a few points, but a good read.

Tip: If you're looking to read this one and your library doesn't have a copy, you can borrow it by the hour at Archive.org if you join (free). Here's the link:
https://archive.org/details/lifewithmothersu00trah