Kelman Dalgety Frost started his writing career at the age of 16, his first published story being written in the trenches in France. After the end of World War I, Frost travelled in Europe and North Africa, where many of his books and serials were set. According to the dustjacket of Sahara Trail, Frost wrote over 40 children’s books: generally in the field of adventure. I haven’t been able to find anywhere near that number written under his name, but neither have I been able to trace a pseudonym. His Times obituary described him as 'one of the most prolific writers of non classical children’s stories ever known, [who] kept more boys quiet absorbed in his latest episode.... Than any other parent of his generation.' Frost wrote the Don Lawrence Western series, which appeared as a comic strip, so I wonder if the 40 titles included comic books as well as pseudonymous titles.
None of his books are traditional pony books, but there are some which involve horses, principally, as you would expect from books set in the Sahara, the Arab. At least two of his books, Sahara Sunset and Sahara Desert, are adult novels with little or no horse content as far as I am aware. Two of his books are about Ruth and Jeff, and the Arabian stallion Shalimar. Son of the Sahara was made into a six part television series by the Children’s Film Foundation.
Finding the books
Drinker of the Wind , Sahara Hostage, and Son of the Sahara are easy to find, though pricing is variable; Stallion of the Desert is pricier; and Hoofbeats on the Prairie and Sahara Trail are easy to find and usually cheap.
Links and sources
Son of the Sahara on IMDB
Dustjacket, Sahara Trail
Bibliography: pony books only
Drinker of the Wind, Thomas Nelson & Sons, London, 1960, illus Joan Kiddell-Monroe, 247 pp.
Sahara Hostage, Nelson, London, 1962, illus Joan Kiddell-Monroe, 229 pp.
Son of the Sahara, Hutchinson of London, 1962, illus Victor Ambrus, 207 pp.
Roy Publishers, New York, 1965, 207 pp.
Stallion of the Desert, Abelard-Schuman, London, 1966, illus Charles Pickard, 167 pp.
Hoofbeats on the Prairie, Thomas Nelson & Sons, London, 1966, 122 pp.
Sahara Trail, Nelson, London, 1972, illus John Roberts, 121 pp.
T Nelson, Nashville, 1974, 156 pp.