This interesting compilation of essays written over a period of thirty years by the author addresses issues that arise frequently in physics -- for example, those connected with the understanding of quantum mechanics. While some essays deal with physical theories in general, those categorized in quantum mechanics include topics in closed systems, and spacetime approach. Quantum universe is explained through the generalization of standard quantum mechanics that is necessary for quantum spacetime geometry and quantum cosmology. Some personal recollections of distinguished collaborators are also appended in this volume. The essays may vary in length, style or level but are certainly accessible to most physicists.
