"Being Santa Claus: What I Learned about the True Meaning of Christmas" by Sal Lizard
Sal Lizard was in his twenties when his beard and hair turned completely white. Today he appears everywhere from malls and parades to schools and hospitals. And— from his custom-made red velvet suits to the mistletoe that hangs from the rearview mirror in his Santa-mobile—he is Santa Claus three hundred and sixty-five days a year.
He writes about it in Being Santa Claus: What I Learned about the True Meaning of Christmas.