Please let me know few (~3 books) Books for the young researchers (STARTING Ph.D program) on (i) Quantum Entanglement and (ii) Nonlinear Optics, (iii) Bose Einstein Condensation
I suggest you to collect the research papers and lecture notes. You can get the information about your questions, I think, if you put searches on internet. It is better to use a library, otherwise you cannot access as most of them are not free website. The books are generally very costly.