John Albert Johnson, a Democrat, was elected governor of Minnesota in 1904, 1906 and 1908. He served from January 1905 to his death at age fifty-eight on September 21, 1909.
After Johnson's death, two members of his "kitchen cabinet" --Frank A. Day, his private secretary, and Theodore M. Knappen, a former newspaperman--wrote his biography, which was published in 1910. As expected, it is a sympathetic and laudatory account of his life. It is posted here.
It has been surpassed by Winifred G. Helmes's far more scholarly biography, "John A. Johnson: The People's Governor" published by the University of Minnesota Press in 1949.