I’m mainly thinking of biographies. There are lots of interesting people of history in those time periods that you could add biographies or autobiographies of, as well as more time period historical fiction; for example, biographies on John and Abigail Adams, George Washington, Thomas Jefferson, more Charles Dickens books, David Livingstone, Abraham Lincoln, Alexander Graham Bell, Helen Keller, George Washington Carver, Booker T. Washington, Teddy Roosevelt, Franklin D. Roosevelt, Corrie Ten Boom, Ronald Reagan or any of the other presidents, more Albert Marrin books, more Russell Freedman books, the other volume of America: The Last Best Hope, more G. A. Henty books (that’s all I can think of off the top of my head right now, but the possibilities are vast).