The world's oldest work of literature, the Epic of Gilgamesh recounts the adventures of the semimythical Sumerian king of Uruk and his ultimately futile quest for immortality after the death of his friend and companion, Enkidu, a wildman sent by the gods. Gilgamesh was deified by the Sumerians around 2500 BCE, and his tale as we know it today was codified in cuneiform tablets around 1750 BCE and continued to influence ancient cultures--whether...