Divine Conspiracy – Dallas Willard
A seminal work in Christian writing in the last 50 years. This book will challenge you more than most any other book you have ever read. At times you will think the vision for life that Willard is casting is just too far-fetched for this world, but as he continually buffets his points with scripture after scripture you will see that not only is this life possible, it is what we should strive for daily. This book is one you definitely need to read soon.