My Utmost for His Highest has sold 13 million copies. But did you know that the book was not published until 10 years after Oswald's death? The person behind the compilation and publication was his devoted and indefatigable wife, Biddy, who went on to complete another 29 books from her husband's notes. In Mrs. Oswald Chambers, Michelle Ule traces the life of this remarkable woman, providing insights into the incredible life that she lived and the selfless dedication she expressed as she served God’s kingdom.