Based on - could mean a novel - sometimes fiction is the best way to get people interested. My wife had zero interest in military history until she picked up a copy of The Killer Angels in Gettysburg and became hooked on the American Civil War. Do not discourage would be authors - it's difficult enough as it is.
Not meant as discouragement merely an attempt to get some focus on a huge topic. What is meant by the first people to land in Sicily?>