To comply with copyright rules, I am also open to purchasing a digital copy if a legitimate source exists – so far, CUP shows it as out of stock.
I am currently reviewing advanced quantum mechanics and have found that "Problems in Quantum Mechanics with Solutions" by G. L. Squires (Cambridge University Press) is highly recommended for mastering problem-solving techniques, particularly for applications of the Schrödinger equation, matrix mechanics, and approximation methods. problems in quantum mechanics with solutions squires pdf
Here's a scanned copy of Squires' classic problem book with fully worked solutions. To comply with copyright rules, I am also