St. Francis of Assisi
Aquinas's Shorter Summa: Saint Thomas's Own Concise Version of His Summa Theologica
The Everlasting Man
A Shorter Summa: The Essential Philosophical Passages of Saint Thomas Aquinas' Summa Theologica
Guide to Thomas Aquinas
Orthodoxy
A Summa of the Summa
Saint Francis of Assisi
Aquinas (A Beginner's Guide)
Thomas Aquinas in 50 Pages: A Layman's Quick Guide to Thomism