Books
The ultimate book is the Holy Bible
Here are some other ones that are highly recommend
Listed by topic
For establishing a solid knowledge base it is recommend to read books in the following topical order:
1. God & Relationship with Him
2. Identity & Believing
3. Mental & Emotional Health
4. Christian Living
5. Spiritual Warfare & Deliverance from Demons
6. Mission Work
God & Relationship with Him
Pursuit of God - A.W Tozer
Knowledge of the Holy - A.W Tozer
Practicing the presence of God - Brother Lawrence
Identity & Believing
Awake to Righteousness - Mark Greenwood
The Power of Right Believing - Joseph Prince
Really Really Free - Curtis Hartshorn
Mental & Emotional Health
Soul Care - Rob Reimer
Feelings and Faith: Cultivating Godly Emotions in the Christian Life - Brian Borgman
Christian Living
Humility & Absolute Surrender - Andrew Murray
Pilgrim’s Progress - John Bunyan
The bait of Satan - John Bevere
Pride versus Humility - Derek Prince
Spiritual Warfare & Deliverance from Demons
Pulling down strongholds - Derek Prince
They shall expel demons - Derek Prince
Mission Work
Mountain Rain - Eileen Crossman, James Fraser
Chasing the Dragon - Jackie Pullinger
God’s Smuggler - John & Elizabeth Sherill, Andrew
Hudson Taylor - Hudson Taylor
Gladys Aylward - Christine Hunter, Gladys Aylward
George Muller: Delighted in God - Roger Steer, George Muller
Peace Child - Don Richardson
Bruchko: The Astonishing True Story of a 19 Year Old - Bruce Olson
D.L. Moody - Bonnie Harvey
Bible Validation
The Dead Sea Scrolls - Revised Edition: A New Translation - Michael O Wise, Martin G. Abegg Jr., Edward M. Cook
Can I really trust the Bible? - Barry Cooper
Historical
50 People Every Christian Should Know: Learning from Spiritual Giants of the Faith - Warren W. Wiersbe
From Jerusalem to Irian Jaya: A Biographical History of Christian Missions, Second Edition - Ruth A. Tucker
Parenting & Working with Kids
The 5 Love Languages of Children - Gary Chapman & Ross Campbell
How to Really Love Your Child, Revised and Updated - Ross Campbell