For your convenience I have linked these books to Amazon or Thriftbooks. Feel free to order from whomever you like, I receive no benefits from either company
Characteristics of a Disciple
Bridges, Jerry. The Blessing of Humility. Colorado Springs, NavPress, 2017.
________. The Fruitful Life. Colorado Springs: NavPress, 2006.
________. The Practice of Godliness. Colorado Springs: NavPress, 1983, 1996, 2008.
________. The Pursuit of Holiness. Colorado Springs: NavPress, 1978, 1996, 2006.
A. W. Tozer. The Pursuit of God. Harrisburg, PA: Christian Publications, 2017. (The first edition published in 1948).
Discipleship
Bonhoeffer, Dietrich. The Cost of Discipleship. Rev. ed. Translated by R. H. Fuller. New York: Touchstone, 1959. (Originally published in 1937).
_________. Life Together. Translated by John W. Doberstein. New York: Harper and Brothers, 1954.
Bridges, Jerry. Growing Your Faith. Colorado Springs: NavPress, 2004.
________. Respectable Sins. Colorado Springs: NavPress, 2007.
Piper, John. Desiring God. Rev. Ed. Colorado Springs, Multnomah, 2011.
________. Don’t Waste Your Life. Wheaton, IL: Crossway, 2003.
________. Let the Nations Be Glad. Grand Rapids: Baker Academic, 1993, 2003, 2010.
Prayer
Blackaby, Henry and Norman Blackaby. Experiencing Prayer with Jesus: The Power of His Presence and Example. Sisters, OR: Multnomah, 2006.
Carson, D. A. Praying with Paul: A Call to Spiritual Reformation. 2nd Edition. Grand Rapids: Baker, 2014.
Elliff, Bill. The Presence Centered Church. Little Rock, AR: Truthlink, 2015.
Foster, Richard J. Prayer: Finding the Hearts True Home. San Francisco: Harper Collins, 1992.
Hemphill, Ken. The Prayer of Jesus: The Promise and Power of Living in the Lord’s Prayer. Nashville: Broadman and Holman, 2001.
Hunt, T. W. The Doctrine of Prayer. Nashville: LifeWay, 1986.
Keller, Timothy. Prayer: Experiencing Awe and Intimacy with God. New York: Penguin Group, 2014.
Millar, J. Gary. Calling on the Name of the Lord: A Biblical Theology of Prayer. Downers Grove, IL: InterVarsity, 2016.
Miller, Paul E. A Praying Life: Connecting with God in a Distracting World. Colorado Springs: NavPress, 2017.
Mohler, R. Albert, Jr. The Prayer that Turns the World Upside Down: The Lord’s Prayer as a Manifesto for Revolution. Nashville: Nelson, 2018.
Onwuchekwa, John. Prayer: How Praying Together Shapes the Church. Wheaton, IL: Crossway, 2018.
Pratt, Richard L., Jr. Pray with Your Eyes Open. Phillipsburg, NJ: Reformed, 1987.
Reeves, Michael. Enjoy Your Prayer Life. Leyland, England: 10Publishing, 2014.
Scripture
Chan, Francis. Multiply. Colorado Springs: David C. Cook, 2012.
Fee, Gordon D. and Douglas Stuart. How to Read the Bible for All Its Worth. Grand Rapids: Zondervan, 1981, 1993, 2003, 2014.
Rogers, Matt and Donny Mathis. Seven Arrows. Spring Hill, TN: Rainer Group, 2017.
Spiritual Disciplines (or Habits)
Foster, Richard J. Celebration of Discipline: The Path to Spiritual Growth. Revised and Expanded. San Francisco, Harper Collins, 1988.
Whitney, Donald S. Spiritual Disciplines for the Christian Life. Updated and Revised. Colorado Springs: NavPress, 2014.
Willard, Dallas. The Spirit of the Disciplines: Understanding How God Changes Lives. New York: Harper Collins, 1988.
Warren, Tish Harrison. Liturgy of the Ordinary: Sacred Practices in Everyday Life. Downers Grove, IL: InterVarsity, 2016.
Spirituality
Anderson, Keith. A Spirituality of Listening. Downers Grove, IL: InterVarsity, 2016.
McGrath, Alister, Christian Spirituality. Malden, MA: Blackwell, 1999.
Morgan, Christopher W., ed. Biblical Spirituality. Wheaton, IL: Crossway, 2001.
Spiritual Warfare
Arnold, Clinton E. 3 Crucial Questions about Spiritual Warfare. Three Crucial Questions Series. Grand Rapids: Baker, 1997.
__________. Powers of Darkness: Principalities and Powers in Paul’s Letters. Downers Grove: IVP, 1992.
Beilby, James K. and Paul R. Eddy, editors. Understanding Spiritual Warfare: Four Views. Grand Rapids: Baker, 2012.
Cole, Graham A. Against the Darkness: The Doctrine of Angels, Satan, and Demons. Wheaton, IL: Crossway, 2019.
Cook, Willam F. and Chuck Lawless. Spiritual Warfare in the Storyline of Scripture. Nashville: B & H Academic, 2019.
Heiser, Michael S. Supernatural. Bellingham, WA: Lexham, 2015.
________. The Unseen Realm. Bellingham, WA: Lexham, 2015.
Lawless, Chuck. Discipled Warriors: Growing Healthy Churches That Are Equipped for Spiritual Warfare. Grand Rapids: Kregel, 2002.
_________. Putting on the Armor: Equipped and Deployed for Spiritual Warfare. Nashville: Lifeway Church Resources, 2007.
Lightner, Robert. Angels, Satan and Demons. Swindoll Leadership Series. Nashville: Nelson, 1998.
Schemm, Peter R., Jr. “The Agents of God: Angels.” In A Theology for the Church, revised edition edited by Daniel L. Akin. Nashville: B&H, 2014.
Sproul, R.C. Unseen Realities: Heaven, Hell, Angels and Demons. Ross-shire, Scotland: Christian Focus, 2012.