Rosewater is absolutely one of my favorites of Vonnegut, it will always have a special place in my heart. And hey, don't beat yourself over things you have no control over, try to be kind to yourself and allow yourself a moment to breath. I'm not good at getting people to kick those kinds of habits but if you ever want to talk I will respond.

To answer your question, I might suggest Till We Have Faces by C.S. Lewis. It's one of my favorite books of all time, I can't stress enough how much of a good book it is. As well as all things Salinger like Nine Stories.

Please be well.