“The Sage of Monticello” is a biography and historical textbook written by Dumas Malone. This hardcover book, part of the “Jefferson and His Time” series published by Little Brown & Company in 1981, delves into the life and times of Thomas Jefferson, focusing particularly on his role in the Revolutionary War and his presidency. With 551 pages, the book provides a comprehensive look at one of the most iconic figures in American history, making it a valuable resource for students and history enthusiasts alike.