Books by Jon Deva

You Can Do The Splits! Scientific Stretching for Fast Results!: Everything You Need to Know to Achieve Maximum Flexibility as Quickly, Safely and Efficiently as Possible!
Jon Deva

You Can Do The Splits! : Scientific Stretching for Fast Results!: Everything You Need to Know to Achieve Maximum Flexibility as Quickly, Safely and Efficiently as Possible!
Jon Deva