of Lorimer's last acts as editor of the Saturday Evening Post was to serialize Northwest Passage in 1936 and 1937. As a result of the success of the serialization, the book, when published, became the second-best-selling novel in 1937 and fifth best for the year 1938. Oliver Wiswell also spent two years in the top ten (1940 and 1941), and Lydia Bailey reached the top ten in 1947. One of Roberts's closest friends and neighbors, the novelist A. Hamilton Gibbs, later stated that he believed that Roberts probably "wrote himself out" after Oliver Wiswell and certainly had done so after Lydia Bailey. Key historical novels by Roberts and their topics include the following:Arundel (1929), on the American Revolution through the Battle of QuebecThe Lively Lady (1931), on the War of 1812Rabble in Arms (1933), the sequel to Arundel, on the American Revolution through the Battles of SaratogaCaptain Caution (1934), on the War of 1812Northwest Passage (1937), on the French and Indian War and the Jonathan Carver expeditionOliver Wiswell (1940), on the American Revolution from a Loyalist's perspective, from the Siege of Boston to the United Empire LoyalistsLydia Bailey (1947), on the Haitian Revolution and the First Barbary WarBoon Island (1955), on a 1710 shipwreck on Boon Island, Maine In 1957, two months before his death, Roberts received a Pulitzer Prize Special Citation "for his historical novels which have long contributed to the creation of greater interest in our early American history.""Special Awards and Citations". The Pulitzer Prizes. Retrieved 2013-11-02. He died, aged 71, in Kennebunkport. Controversies Immigration While a reporter for the Saturday Evening Post in the early 1920s, Roberts wrote many magazine articles and a book during the period immediately following World War I that urged strong legal restrictions on immigration from eastern and southern Europe and from Mexico, warning of the dangers of immigration from places other than northwestern Europe. He became a leading voice for stricter immigration laws and testified before a congressional committee on the subject. He wrote: “If America doesn’t keep out the queer alien mongrelized people of Southern and Eastern Europe, her crop of citizens will eventually be dwarfed and mongrelized in turn.” In Why Europe Leaves Home, derived from his Post articles, Roberts further referred to Jews as "human parasites" and was separately quoted warning against further "Semitic" immigration to America, which he feared would turn the U.S. population into a "worthless and