Handbook of gravitational wave astronomy This handbook provides an updated comprehensive description of gravitational wave astronomy. In the first part it reviews gravitational wave experiments from ground and space based laser interferometers to pulsar timing arrays and indirect detection from the cosmic microwave background. In the second part it discusses a number of astrophysical and cosmological gravitational wave sources including black holes neutron stars possible more exotic objects and sources in the early Universe. The third part of the book reviews the methods to calculate gravitational waveforms. The fourth and last part of the book covers techniques employed in gravitational wave astronomy data analysis. This book represents both a valuable resource for graduate students and an important reference for researchers in gravitational wave astronomy. Introduction to gravitational wave astronomy Gravitational wave detectors Gravitational wave sources Gravitational wave modeling Data analysis techniques Testing the nature of dark compact objects with gravitational waves Advances in Machine and Deep Learning for Modeling and Real time Detection of Multi Messenger Sources Measuring cosmological parameters with gravitational waves Detection Landscape in the Deci Hertz Gravitational Wave Spectrum Machine learning for characterization of gravitational wave data.