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 of Mary Pollock (middle name plus first married name), in addition to the eleven published under her own name that year. So popular were Pollock's books that one reviewer was prompted to observe that "Enid Blyton had better look to her laurels". But Blyton's readers were not so easily deceived and many complained about the subterfuge to her and her publisher, with the result that all six books published under the name of Mary Pollock – two in 1940 and four in 1943 – were reissued under Blyton's name. Later in 1940 Blyton published the first of her boarding school