The God They Never Knew is about knowing God and having a relationship with him. 

From chapter one: "Who are the deceivers and why are they deceivers? The deceivers are a coalition of the religiously affiliated who know quite a lot about God but fail to relate to Him on a personal basis. They include faithful churchmen, Bible school and seminary graduates, fundamentalists and evangelicals. They are the people who are incredibly active doing good works under the banner of Jesus Christ, but who have never slowed down enough to get to know the One they think they are serving. Carnal theological professors, whose hearts may mutter in secret, “God has a wonderful plan for my life,” have failed to realize that Christianity, in its naked essence, is nothing less than a relationship. Whatever else may issue forth from the Christian life must be rooted in that sublime relationship—God with the soul."