History of Hittite Literacy

Why did the Anatolians remain illiterate for so long, although surrounded by people using script? Why and how did they eventually adopt the cuneiform writing system and why did they still invent a second, hieroglyphic script of their own? What did and didn''t they write down and what role did Hittite literature, the oldest known literature in any Indo-European language, play? These and many other ...