1. Introduction
2. The Data Set
2.1. Multi-Wavelength Coverage in the COSMOS Field
2.2. Sample Selection
2.3. The Obscured Sample
3. CT Spectral Modeling
4. Results
4.1. XMM–Newton pn, MOS and Chandra Spectra
4.2. Bolometric Luminosity
5. SMBH and Host Properties of Highly Obscured Sources
5.1. \(M_{BH}\), \(\lambda_{Edd}\) and \(M_{*}\)
5.2. sSFR
6. Atlas of Multi-Wavelength Properties of CT AGN
6.1. Optical Spectra
6.2. Broad Band SED
6.3. Morphology
7. Discussion
7.2. Implication for CXB Models
8. Summary