1. Introduction

2. Synthetic Spectral Libraries for APOGEE
2.1. ATLAS9/ASS ǫ T spectral library
2.2. MARCS/Turbo spectrum spectral library

3. Comparison between ATLAS9/ASS ǫ T – MARCS/Turbo spectrum spectral libraries

4. Comparisons of the Solar and Arcturus spectra with Syntheses from Spectral libraries

5. Application of the APOGEE spectral libraries to selected giant stars

6. Conclusions and future work