 Inspired by the success of his younger brother, who had four novels published starting in 1948, he altered his writing style; and, by 1951, using the John Wyndham pen name for the first time, he wrote the novel "The Day of the Triffids".His pre-war writing career was not mentioned in the book's publicity, and people were allowed to assume that it was a first novel from a previously unknown writer.The book proved to be an enormous success and established Wyndham as an important exponent of science fiction.