| Resource | Author/Source | Content Level | Legal Access Link | |----------|---------------|---------------|-------------------| | Quantum Mechanics (Vol 1 & 2) | Claude Cohen-Tannoudji (Nobel laureate) | Advanced UG/PG | Internet Archive (legacy editions) | | Introduction to Quantum Mechanics | David J. Griffiths | UG standard | Sample chapters on Cambridge site | | The Feynman Lectures on Physics Vol III | Richard Feynman | Conceptual | Caltech’s free online edition | | MIT OpenCourseWare 8.04 Quantum Physics I | Prof. Barton Zwiebach | Complete course | ocw.mit.edu | | NPTEL Quantum Mechanics | IIT professors (e.g., V. Balakrishnan) | Video + notes | nptel.ac.in | | Quantum Mechanics for Scientists & Engineers | Stanford (Prof. David Miller) | UG | stanford.edu/online |