The Limey Way is a 65-kilometre (40 mi) challenge walk through Derbyshire, England.
It starts at Castleton and progresses through 15 major and 5 minor limestone dales to reach the River Dove and Dovedale, the walk's end.
He wrote a copyright guide to the walk, which has been updated and enlarged over the years.
More than 75,000 people have walked the route in either under 24 hours - Red Badge or under 48 hours - Green badge.
The Limey Way published by The John Merrill Foundation 1989.