Consider a book by C.S. Lewis, an author who wrote for both young people and adults…

Spiritual Reading

Story of a Soul by Saint therese of lisieux
At the Heart of the Gospel by Christopher West
The Complete C. S. Lewis Signature Classics
Lapsed Agnostic by John Waters
A Simple Path by mother theresa
Maurice and Therese The Story of a Love by Patrick Ahern
The Long Loneliness by Dorothy Day
Jesus of Nazareth by Joseph Ratzinger
Spiritual Friendship by Aelred of Rievaulx
Redeemed by Heather King
Pope John Paul 2 in my own words

Great reads in the Christian Spirit

A Prayer for Owen Meany
The Diary of a Country Priest by Georges Bernanos
A Soldier of the Great War by Mark Helprin
Charming Billy by Alice McDermott
The Lord of the Rings by J.R.R. Tolkien
In This House of Brede by Rumer Godden
Pilgrim at Tinker Creek by Annie Dillard
Till We Have Faces C.S. Lewis book
The Timeless Way of Building by Christopher Alexander
Hannah Coulter by Wendell Berry
Sigrid Undset by Kristin Lavransdatter
The Moviegoer by Walker Percy