The Handbook is divided into six parts. Part A: Introduction to Spacetime Structure. Part B: Foundational Issues. Part C: Spacetime Structure and Mathematics. Part D: Confronting Relativity theories with observations. Part E: General relativity and the universe. Part F: Spacetime beyond Einstein.
Abhay Ashtekar is Eberly Professor of Physics and Director of the Institute for Gravitation and the Cosmos at The Pennsylvania State University. He is one of the founders of Loop Quantum Gravity and its subfield Loop Quantum Cosmology. He is author or co-author of several books on relativity and cosmology, and an editor-in-chief of the Springer journal “General Relativity and Gravitation”.
Vesselin Petkov received a graduate degree in physics from Sofia University, a doctorate in philosophy from the Institute for Philosophical Research of the Bulgarian Academy of Sciences, and a doctorate in physics from Concordia University in Montreal. Vesselin Petkov is one of the founding members of the Institute for Foundational Studies "Hermann Minkowski".