I'm a big fan of RG but this book blew me away. I'm equally fond of This House of Brede, another convent book, but this one seems much darker.
It's about a woman who was previously the proprietor of a brothel in Paris just post WW2.he becomes a nun and is later exposed in terms of her previous work. It really is VERY dark and the most beautifully written - very RG.
Had anyone else read it? I think it's out of print, I've got a very dramatic 70s feel cover picture on mine.