This festschrift was conceived in connection with the symposium "Topics on Quantum Gravity and Beyond," held in honor of Louis Witten. The majority of the essays deal with problems on the frontiers of quantum gravity and string theories. There are also articles on atomic, nuclear, and particle physics, to name a few.
Two-dimensional string theory and black holes, E. Witten; lessons from D=3 gravity theories, S. Deser; problems of naturalness - some lessons from string theory, M. Dine; how does the classical world emerge from the wave function?, B. deWitt; noncompact symmetries from dimensional reduction, J.H. Schwarz; monopoles and blackholes, K.C. Wali; Euclidean Maxwell-Einstein theory, D. Brill; dilaton gravity and WZW models, C.R. Nappi; localized energy in general relativity and the implications for gravitational radiation, F.I. Cooperstock; physical solutions of semiclassical relativistic models with quantum corrections, L. Parker. (Part contents)