I make no secret of the fact that Christless Christianity, by Michael Horton, is one of the most influential books I have read over the last five years. What I love about this book is that Horton reveals the works righteous gospel as something that runs far deeper than I ever realized. It is a plague that is evident in liberalism, fundamentalism, and many in between. Horton calls it the religion of "moralistic therapeutic deism" and there is a decent chance that you might be a subscriber to this religion.
The following discussion between Horton and RC Sproul is well worth watching to hear two great modern Christian thinkers discuss this issue of eternal consequence: