Tutorial Guide to X-ray and Gamma-ray Astronomy: Data Reduction and Analysis

Recent Progress on Gravity Tests: Challenges and Future Perspectives

Regular Black Holes: Towards a New Paradigm of Gravitational Collapse

Handbook of X-ray and Gamma-ray Astrophysics

Handbook of Gravitational Wave Astronomy

High-Resolution X-ray Spectroscopy: Instrumentation, Data Analysis, and Science

New Frontiers in GRMHD Simulations