Sisters is one of the romance novel of Kathleen Thompson Norris who was an American novelist and wife of fellow writer Charles Norris, whom she wed in 1909. She was educated in a special course at the University of California and wrote many popular romance novels that some considered sentimental and honest in their prose. Norris was the highest-paid female writer of her time, and many of her novels are held in high regard today. Many of her novels were set in California, particularly the San Francisco area. They feature detailed descriptions of the upper-class lifestyle. After 1910 she contributed to Atlantic, The American Magazine, McClure's, Everybody's, Ladies' Home Journal and Woman's Home Companion.