Start with high-confidence religious biographies books, then narrow by subgenre or adjacent topics.
I Can't Keep My Own Secrets
Larry Smith, Rachel Fershleiser
His Holiness the Dalai Lama in 100 Anecdotes
Arthy Muthanna Nainy
I Would Die for You
Brent Higgins, Deanna Higgins
Buddha: an Enlightened Life
Kieron Moore, Rajesh Nagulakonda
