Christians are people of words, so I encourage you to become a good reader. Here are 10 core titles that would give you a solid grounding and a good start.
1. The Bible
If you could only read one book, make sure it’s the Bible. With 66 books in one volume, it’s a great deal! Good translations (of the many out there) include the New International Version, the Holman Bible, the English Standard Version, the King James Version (if you like older language) and, most recently, the Christian Standard Bible. My suggestion is to pick the translation above that is used in your church’s sermons.
2. More than a Carpenter by Josh McDowell
This is a good little book which will introduce you to Jesus. If you are looking for a good book to give to someone so they can learn about Jesus, this will do you well.
3. Knowing God by J.I. Packer
This book gives you a good basis in Christian truth. God by nature is so big and amazing, this is a helpful book to get you looking at the character and concerns of God.
4. The Atonement by L. Morris or The Cross of Christ by J. Stott
Both of these books aim to help the reader understand the significance of the cross of Christ. The most recent edition of John Stott’s The Cross of Christ comes with an excellent study guide.
5. According to Plan by Graeme Goldsworthy
This book will help you understand how the Bible fits together—it helpfully looks at God’s unfolding salvation plan fulfilled by Jesus (Biblical theology). If you find this book a little heavy, then God’s Big Picture by Vaughan Roberts may be a good alternative.
6. Reason for God by Tim Keller
This book gives you a good basis for defending your faith. For the believer or the skeptic, this is an engaging read.
7. Praying with Paul: A Call for Spiritual Reformation by D.A. Carson
This book will give you a good basis for thinking about prayer and then it will challenge you to pray.
8. The Trellis and the Vine by C.M. Marshall and T Payne
This book is a practical ministry book which places the how of ministry in the context of the why.
9. Disciplines of a Godly Man by R.Kent Hughes or Disciplines of a Godly Woman by Barbara Hughes
These very helpful books aim to help the Christian man or woman give attention to practices of godliness.
10. Jesus & the Rise of Early Christianity by P. Barnett
Understanding the original setting into which Jesus arrived, and from which his good news first spread, is helpful for understanding the historical importance of Christianity. This book is a great introduction.
Happy reading! Feel free to offer other suggestions (and why) in the comments.