W. James Riddell MBE (27 December 1909 – 2 February 2000) was a British champion skier, author, and photographer.
Educated at Harrow School, he played cricket against Eton. At Clare College, Cambridge, he read modern languages, but took a year out to practise gorilla and cheetah photography in the Belgian Congo and Kenya, interspersed with writing children's books and publicity activities for De Havilland, Selfridges and Fortnum and Mason.
Riddell was a winter sports polymath. In 1930, he had skied at 127.96 km an hour in the Flying Kilometre at St Moritz. In the Garmisch Olympic downhill, which was part of the Olympic combined event.
In 1948, with the writer Nevil Shute, he made a six-month flight to Australia and back in a single-engine Percival Proctor monoplane. From that experience, Riddell wrote a travel book, Flight of Fancy, and Shute the novel, A Town Like Alice.