Start with high-confidence religious ethics books, then narrow by subgenre or adjacent topics.
Happiness Is a Serious Problem
Dennis Prager
Beyond Religion
Dalai Lama, Dalai Lama XIV
Jewish Wisdom
Joseph Telushkin
An Introduction to Biblical Ethics
David W. Jones, Daniel Heimbach
Why Does God Allow War?
Martyn Lloyd-Jones, John MacArthur
Al-ghazali on Intention, Sincerity and Truthfulness
Abu Hamid Al-Ghazali, Anthony Shaker
