Start with high-confidence catholicism books, then narrow by subgenre or adjacent topics.
Trent
John W. O'Malley, John W. O'Malley
He Leadeth Me
Walter J. Ciszek S.J., Daniel L. Flaherty S.J.
New Seeds of Contemplation
Thomas Merton, Sue Monk Kidd
The Reed of God
Caryll Houselander, Marie Anne Mayeski
No Greater Love
Mother Teresa, Thomas Moore
