""A Corn of Wheat: The Life Story of Clara Leffingwell"" is a biographical book written by Helen I. Root. The book tells the story of Clara Leffingwell, a woman who dedicated her life to serving others. Clara was born in 1874 in Indiana and grew up in a family that valued education and service. She became a teacher and then a missionary, traveling to China in 1901 to work with the China Inland Mission. Clara faced many challenges in her work, including...