Enid Blyton eighth book in the Adventure series, "The River of Adventure", and her seventh Secret Seven novel, "Secret Seven Win Through". She completed the sixth and final book of the Malory Towers series, "Last Term at Malory Towers", in 1951. Blyton published several further books featuring the character of Scamp the terrier, following on from "The Adventures of Scamp", a novel she had released in 1943 under the pseudonym of Mary Pollock. "Scamp Goes on Holiday" (1952) and "Scamp and Bimbo", "Scamp at School", "Scamp and Caroline" and "Scamp Goes to the Zoo" (1954) were illustrated by Pierre Probst. She introduced
Enid Blyton between 1942 and 1964; 10,000 copies were sold in 1942 alone. The same year, Blyton published the first novel in the Famous Five series, "Five on a Treasure Island", with illustrations by Eileen Soper. Its popularity resulted in twenty-one books between then and 1963, and the characters of Julian, Dick, Anne, George (Georgina) and Timmy the dog became household names in Britain. Matthew Grenby, author of "Children's Literature", states that the five were involved with "unmasking hardened villains and solving serious crimes", although the novels were "hardly 'hard-boiled' thrillers". Blyton based the character of Georgina, a tomboy she described as