In the 1940s, Phillips wrote two million words a year, dictated six to eight hours a day, and earned $250,000 a year. Her other serials of the era included "The Right to Happiness" (1939–60) and "The Brighter Day" (1954–62). In 1938, Phillips supervised the creation of the tie-in book, "The Guiding Light", published by The Guiding Light Co. of 360 North Michigan Avenue Chicago, Illinois. The book traced the backstory of the radio series, told from the point of view of the "keeper of the guiding light", Reverend John Ruthledge.