Hardcore History (the entire amazing series is on iTunes)
Strayer, R.H. (2010). Ways of the World: A Brief Global History with Sources. Bedford/St. Martin's.
Recommended Reading: Diamond, J. (1999). Guns, Germs, and Steel: The Fates of Human Societies. Norton.
Princeton Review (2016). Princeton Review AP Study Guide. Random House LLC.
Zeibell, Z. (2014). History Comic: Part I. Create Space Independent Publishing Company.