For centuries self-assured academics believed Troy was a mythological city -- until, that is, the ruins were discovered. Over the span of history, the human species has lost people, cities and entire civilizations. Occasionally, governments don't want these lost empires to be found. So what happens when a controversial linguist claims to discover an ancient people spanning Iran to Southern China? They don’t want you to read our book. They don’t want you to see us on tour.