Hi everyone. I'll start my master's degree in physics next year. My plan is to continue my studies in theoretical condensed matter physics. So I've decided to increase my knowledge in this area. In my undergrad I took some courses like Intro. to QFT and Many-Body physics. Also I have studied those books by Altland and Simons and Kardar's Statistical Physics of Fields book. So I have at least a little knowledge about ideas like the RG , symmetry breaking, diagrammatic methods etc. Nevertheless I'm really confused about what should I do as the next step. Especially which books should I study now? I asked some Profs in my home university and some recommended me to study upper-division condensed matter books -like Philips' or Marder's- in order to gain a general knowledge about different areas of (hard) condensed matter physics. Some told me to study a bit about quantum computation and information. But I want to do something a bit more purposeful. Something that can help me in my research in the future. For example I've been really interested in High Tc superconductors , but it seems that much of the essential problems in this field are solved -at least to some reasonable extend-. It seems that there are only fields like topological phases -though it seems that not much staffs have remained unexplored there- , FQHT (only one case is unsolved), and some problems like Ads/CMT, SYK models etc. which are not so much relevant to current experiments. So after summarizing above facts, what would be your advice on the next textbooks I should study?