She has more than enough material for a second book. In addition to what’s been mentioned in this thread, she could also cover.
1. Her auditioning for Woody Allen for Bullets Over Broadway. I’m sure she has plenty of tea to spill.
2. More information on the Hello, Dolly! Revival that Jerry Herman put a stop to.
3. And she must have many more stories of men treating her unfairly throughout her career.
4. Her work in TV and film since her first memoir. I’d love to read about her experiences on American Horror Story and Penny Dreadful.
5. In addition to Bullets and Dolly, there are likely plenty of roles she has lost out on that we don’t know about.
6. Her struggles with her hip on stage, and working through the pain.
She could have another online contest to name the book, with the winner being “Patti LuPone: Another Memoir”.
"Broadway...I'll lick you yet!"