DR wrote three books.

The first "Ride It!" published by J H Haynes is indeed the "Complete Book of Motorcycle Trials" from one of the greatest trials riders of that era. The book was the first in a series of practical guide books published by Haynes which are dedicated to motorcycle sports. It was considered only fitting by Haynes that the first book of the series should be written by a true sports icon of the trials world. As such DR got the job. Well worth a read to all book enthusiasts and a complete do not miss to fans of 1960s motorcycle trials.   

The second book "Ride It BMX" came about after Don introduced Bicycle Motocross "BMX" to the UK. It was first published in August 1982 and republished in October and December that year then again in February and December 1983 and in March 1984. BMX was an extremely popular pass time and sport in the late 70s and early 80s and indeed continues to thrive to this day.    

Then there was the 1980 publication by EP Sport Publishing Limited entitled Trials Bike Riding.  

None of these books are in publication at present however they are still in demand. As rare as they are it is understood that all 3 books are passing hands in the States for as much as $80 per book.