1. INTRODUCTION
2. KEY SCIENCE DRIVERS
2.1. Constraining the UV Luminosity Function: How Prevalent Are Luminous Sources?
2.2. Determining the Opacity of Ly α from Independent Lines of Sight
2.3. The Ionizing Capabilities of Luminous Sources and Contributions to Reionization
3. PHOTOMETRIC SELECTIONS AND NIRSPEC DATA SET
4. NIRSPEC PRISM SPECTROSCOPY
5. SUMMARY