Hello everyone! I just finished studying basic quantum mechanics, using Liboff's "Introductory Quantum Mechanics", i.e. wavefunctions, uncertainty relations, basic 1D problems, dirac notation, angular momentum (orbital and spin, addition, eigenfunctions, Clebsch-Gordan coefficients etc), problems in 3D (free particle in spherical, hydrogen atom), matrix mechanics, Heisenberg Picture, time independent perturbation theory, WKB approximation, harmonic oscillator using annihilation and creation operators, plus the mathematics for those (some operator theory and the special functions (legendre, laguerre polynomials, bessel, spherical harmonics etc)). My goal is to study QFT and I suppose I first need some advanced graduate level quantum mechanics. What book should I use? Maybe Schiff or Merzbacher? Sakurai's Advanced Quantum mechanics? Any other recommendation regarding my goal towards QFT? I bought also Feynman's book "path integral and quantum mechanics". Thanks!