Do you know what I like about John Ortberg? I'm reading his book, "God is Closer than You Think," and what I like about it is that he gives you everyday applications for each lesson in the book. In every chapter there's another step you can take in experiencing God's presence in your life (what many like to call a "personal relationship with Jesus"). Instead of just telling you what it's like, or giving you scripture to study, he does all of that and then also tells you how to make changes in your daily life so you too can start building a deeper relationship with God.
I'm a fan of Max Lucado, but books by John Ortberg (see also: The Life You've Always Wanted) are easily applicable, and I enjoy them as daily devotionals.
That's just one girl's opinion.