In my year of birth, that best-selling book was Not as a Stranger by Morton Thompson. I’ve not read it but research suggests it is a melodramatic romance novel about a young doctor who lives for medicine and sacrifices everything for his career. It describes his years at medical school, his practice in a small town and his devoted self-sacrificing wife who works to make their marriage a success. I did find a review of the book:
A film adaptation was made in 1955. It was Stanley Kramer's directorial debut and featured Olivia de Havilland and Robert Mitchum in the lead roles, backed by a stellar supporting cast including Frank Sinatra, Gloria Grahame, Broderick Crawford, Charles Bickford, Lon Chaney, Jr., Harry Morgan, and Lee Marvin.
So what book was most popular in your birth year?