Author: Karl Knopf

Books by Karl Knopf: "Make the Pool Your Gym" First published in 2012 Rank: , Original star rating: , Adjusted star rating: , Pop rating: "Core Strength for 50+" First published in 2012 Rank: , Original star rating: , Adjusted star rating: , Pop rating: "Stretching for 50+" First published in 2005 Rank: , Original star rating: , Adjusted star rating: , Pop rating: "Weights for 50+" First published in 2005 Rank: , Original star rating: , Adjusted star rating: , Pop rating: