1. INTRODUCTION  
2. PROPERTIES OF THE HIGH-REDSHIFT AGN SAMPLE  
2.1. Spectroscopic redshifts  
2.2. Photometric redshifts  
2.3. Summary  
2.4. Optically Unidentified Sources  
2.5. Optical/IR Properties  
3. 0.5-2 KEV AGN NUMBER COUNTS  
4. 2-10 KEV COMOVING SPACE DENSITY  
4.1. Log(LX) > 44.1 Space Density  
4.2. 43.55 < Log(LX) < 44.1 Space Density  
4.3. Obscured Versus Unobscured AGN  
5. COMPARISON WITH MERGER MODELS  
5.1. Alternatives to Mergers  
6. CONCLUSIONS