John Piper's latest book is now available from Desiring God. In Jesus: The Only Way To God, Dr. Piper deals with the fundamental issue of the exclusivity of Jesus Christ. This book will undoubtedly be unpopular in secular culture, where relativism rules the day.
If you follow Jesus, this book probably won't teach you anything new, but I'm sure it will be an encouragement to cherish Christ and Him alone.
I just ordered my copy from DG - only $4.99. Nice.