Abraham Lincoln: A History (Volume 10) by John Hay (1835 - 1905) and John George Nicolay (1832 - 1901)

Abraham Lincoln: A History is an 1890 ten-volume account of the life and times of Abraham Lincoln, written by John Nicolay and John Hay, who were his personal secretaries during the American Civil War. Volume 10 chronicles Lincoln's life in early 1865, including his assassination and the events following. (Summary adapted from wikipedia by Ann Boulais)