On: LIGO black hole echoes hint at general-relativity ...

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Some combination of the following would be a good start, depending on your background:

Quantum Theory for Mathematicians : https://www.amazon.com/Quantum-Theory-Mathematicians-Graduat...

Quantum Mechanics for Mathematicians : https://www.amazon.com/Quantum-Mechanics-Mathematicians-Grad...

Quantum Field Theory and the Standard Model : https://www.amazon.com/Quantum-Field-Theory-Standard-Model/d...