Passionate Life

This is a great study on various aspects of the Christian life.  Using geometric shapes as reminders for each concept, the reader is introduced to important issues regarding being a follower of Jesus.  This book is available incredibly cheap and is perfect for a Bible study or one-on-one discipleship.  

Knowing Christ Today

This is a very good defense of Christianity as an object of knowledge and not just belief.  Dallas Willard confronts the trend of separating religion from the area of knowledge.  There is a very good chapter on how we know the existence of God.

Tender Words of God

A simple and yet powerful devotional that focuses positive and uplifting themes from Scripture.

New Strong Willed Child

This book by well known Focus on the Family founder, James Dobson, is a very helpful resource for parents.  Although focused on "difficult" children and containing a chapter on ADHD, it has principles useful for all situations.