Charles Francis Adams 
Memoirs of John Quincy Adams: Comprising Portions of His Diary from 1795 to 1848. Vol 1 [EPUB ebook] 

John Quincy Adams was the sixth President of the United States but holds a place in history as probably of America’s greatest ever diplomats, negotiating many of the treaties that have formed the United States as we know them today. This is a fascinating biography and a must read for any fan of political history.