The Spiritual Exercises of St. Ignatius: St. Ignatius of Loyola

This is the primary source for Ignatian (Jesuit) spirituality, written by St. Ignatius himself.  The exercises in this book are structured in a 4-week sequence which is still used, in various forms, at Jesuit retreat houses.


The Jesuit Guide to (Almost) Everything: James Martin

This is a comprehensive introduction to Ignatian Spirituality from arguably the most well-known modern Jesuit – James Martin.  This book is more broadly about the "Ignatian Way," and Martin gives great context for understanding what the Ignatian practices are all about.  


A Simple, Life-Changing Prayer (The Examen): Jim Manney

This is a very short introduction the The Examen, a method of prayer in one reviews the day in a prayerful and attentive way in the presence of God.  Manney gives a practical, step-by-step way to practice The Examen.  


Seeing is Believing: Greg Boyd

Greg Boyd is a Protestant, Evangelical pastor.  He writes about a broad array of theological topics including apologetics, open theism, and spiritual practice.  Here he presents a form of visualized prayer that is very similar to Ignatian Imaginative Prayer from a Protestant perspective.