Graham retired in 1961 and was replaced by Kaye Webb who presided over the department for 18 years in a period that saw greatly increased competition in the children's market as well as a greater sophistication in production and marketing. One innovation of Webb's was the creation of the Puffin Club in 1967 and its quarterly magazine "Puffin Post", which at its height had 200,000 members. The Puffin authors' list added Arthur Ransome, Roald Dahl and Ursula K. Le Guin during Webb's editorship and saw the creation of the Peacock series of teenage fiction.