Author Ben Griffin wrote Elvis Presley: Historical And Cultural Perspectives On A Modern Icon that was released on May 14. This is what Amazon has to say about it:
Elvis Presley has made a mark in history beyond his lifetime. While not a giant historical figure on the scale of Plato. Julius Caesar, Washington, Napoleon or Stalin, he still commands attention. Presley has a legacy that is still controversial as a man who rose up and made it to the top of his field, rock 'n' roll music.
Presley has a cultural legacy in the English language with expressions that few other artists have. He is part of the culture in ways that go beyond the music. Rock music in the 1950s spurred social change and Presley was not the first, but permitted others to follow.