Where are you, Bill Withers?

Bill Withers, where have you gone?
Please come back. We need you desperately.

Don't know who Bill Withers is?
How about "Ain't No Sunshine", "Lean on Me", "Just the Two of Us", "Lovely Day", and my personal favorite, "Use Me"? Those do anything for you?

I just listened to his cover of "Let it Be" and it made me sad. Sad because he seems all but gone.
I am gonna do some research.