Grace and I have personally benefited from the following books; they are easy to read and are among the best in their areas of instruction. We have recommended these books many times over the years and have purchased many copies for our friends.

Bibles and Bible Study

Children's Bible
The Jesus Storybook Bible: Every Story Whispers His Name (Zondervan, 2007) by Sally Lloyd-Jones

Inerrancy
God Wrote a Book (Crossway, 2004) by James MacDonald

Bible Study
Reading the Bible with Heart and Mind (NavPress, 1996) by Tremper Longman III

Theology

God
The Knowledge of the Holy (HarperOne, 1978) by A. W. Tozer

Theology
Systematic Theology: An Introduction to Biblical Doctrine (Zondervan, 1995) by Wayne Grudem

Biblical Theology
According to Plan: The Unfolding Revelation of God in the Bible (InterVarsity Press, 2002) by Graeme Goldsworthy

Spiritual Warfare
Three Crucial Questions about Spiritual Warfare (Baker, 1997) by Clinton E. Arnold

For those of you wanting to dig deeper and find books in particular areas of study, especially biblical study, you would benefit from bookmarking http://www.bestcommentaries.com/. For those looking to purchase a Bible, the ESV Study Bible is the new standard for study Bibles. Also great for personal reading and note-taking is the ESV Journaling Bible, patterned after the Moleskine.