Subhendra Mohanty obtained his PhD from University of Wisconsin, Madison, USA in 1989. After that he held postdoctoral positions at CERN and ICTP. He joined the Physical Research Laboratory in Ahmedabad (India) in 1994, where he is currently a Professor. He spent a sabbatical year in Universita Autonoma of Barcelona in 2007. His fields of investigation are particle physics and cosmology. He was elected as a Fellow of National Academy of Sciences India in 2021.He published 100+ papers in international peer-reviewed journals and has been involved in teaching courses for graduate students and young researchers. He already published in Lecture Notes in Physics the volume Astroparticle Physics and Cosmology: Perspectives in the Multimessenger Era (Springer, 2020).

• Introduction.- Prologue: Gravitational Waves in Classical General Relativity.- Field Theory of Linearised Gravity.- Gravitational Wave Radiation from Compact Binaries.- Gravitational Memory and Soft-Graviton Theorem.- Backreaction and Dissipation - the In-In Formalism.- Gravitational Waves from Black-Hole Quasi-Normal Mode Oscillations.- Gravitational Radiation from Spin Dynamics in Binary Orbits.- Refractive Index and Damping of Gravitational Waves in a Medium.- Stochastic Gravitational Waves.- Inflation.