The Cowardly Lion of Oz (1923) is the seventeenth in the series of Oz books created by L. Frank Baum and his successors, and the third written by Ruth Plumly Thompson. It was illustrated by John R. Neill. The story opens with Mustafa of Mudge, a turbaned desert monarch with blue whiskers, who collects lions. Mustafa demands one more lion — he already has nine thousand nine hundred and ninety nine ...