Below are a few discernment resources that may be helpful to you.

Discernment Resources for the Priesthood

• Priests for the New Millennium by Cardinal Timothy Dolan
• Men of Brave Heart by Archbishop José Gómez
• To Save a Thousand Souls by Fr. Brett Brannen
• What Does God Want? A Practical Guide to Making Decisions by Fr. Michael Scanlan, T.O.R. with James Manney.
• A Priest Forever: The Life of Father Eugene Hamilton by Fr. Benedict J. Groeschel C.F.R.
• The Cure D’Ars Today: St John Vianney by Fr. George W. Rutler
• Dignity And Duties Of the Priest by St. Alphonsus Liguori
• Witness to Hope: The Biography of Pope John Paul II by George Weigel
• Vocations | USCCB

Catholic Church Teaching

• Catechism of the Catholic Church
• Ordinatio Sacerdotalis. Apostolic Letter on Reserving Priestly Ordination To Men Alone by Pope John Paul II, May 22, 1994
• Sacerdotalis Caelibatus (The Celibacy of the Priest) by Pope Paul VI, June 24, 1967
• Pastores Dabo Vobis (I Will Give You Shepherds) Apostolic Exhortation On the Formation of Priests in the Circumstances of the Present Day by Pope John Paul II, March 25, 1992
• Jesus of Nazareth: From the Baptism in the Jordan to the Transfiguration by Pope Benedict XVI
• A Living Sacrifice: Guidance for Men Discerning Religious Life by Fr. Benedict Croell, O.P. and Fr. Andrew Hofer, O.P.
• Questions and Answers for Today’s Catholics by Michael Manning
• The Priest and the Third Christian Millennium: Teacher of the Word, Minister of the Sacraments, and Leader of the Community by Congregation for the Clergy, 1999

Spirituality

• Confessions by St. Augustine
• An Introduction to the Devout Life by St. Francis de Sales
• The Imitation of Christ by Thomas à Kempis
• The Story of a Soul by St. Thérèse of Lisieux
• Soul of the Apostolate by Dom Jean-Baptiste Chautard, O.C.S.O.
• Pastoral Presence and the Diocesan Priest by Fr. Paul T. Keyes