These books are incredible resources for those seeking to grow in the spiritual life and clarify interior movements of the heart. The rules of the Spiritual Exercises of St Ignatius are presented in their original text, explained with precision and clarity, and reinforced through practical examples. This is the best volume to start with, followed by Fr Gallagher's book on the Examen, and then "Spiritual Consolation" (which pertains to the "second week" of the Spiritual Exercises). I read this a couple years ago but didn't pick it back up until this year. Well worth your time to read this short book, become familiar with these principles, and return to them (along with a spiritual director of some sort) when facing uncertain decisions.
What I love most about St. Ignatius, and why he is so deeply Catholic, is his entire spirituality is about freedom, choice, and holistic integration of the person. God gave us freedom not for its own sake, but so that we may choose Him. Our hearts are wounded and deceitful, but still made by God; our very selves and personalities, while conditioned and warped by sin, are also given by God. With Christ we are called to be crucified and die to ourselves--but not so that we may stay dead, but so that we may be resurrected with Christ. Our hearts are redeemed, not annihilated. Rather than prescribing rote conformity, the rules of Ignatius help us actually train our hearts and minds to understand and choose God's will in our unique circumstances, leaving vast landscapes open for us to explore with God. Ignatian spirituality, as the very name "Spiritual Exercises" suggests, is therefore all about training--training for awareness, understanding, choice--but all within the unrepeatable circumstances of each of our God-given lives.