This book, Nucleus Quark and Cosmology (NQC) is essentially a compilation of the major scientific papers, published by the present author throughout his career, starting from London, Bombay, Calcutta, CERN (Geneva) and RHIC (Brookhaven National Laboratory). Nuclear Physics in early years at King's London and Rutherford High Energy Laboratory, then BARC, Mumbai extensively researched by the present author is not covered in this book. This is done to keep the length of this book within reasonable size. However, for completeness the full list of publication is enclosed. The exhaustive work done by the present author and his colleagues on Quark Gluon Plasma at CERN, RHIC and the theoretical work done at Saha Institute of Nuclear Physics and the Cyclotron Centre, Kolkata, India is the kernel of this book. Cosmology is an obvious and exciting spin off. The changing scenario of interest of the author, it is felt is a fairly good cursor of the changing pattern of the very profile of physical science.