This second volume of three on relativistic quantum theories of interacting charged particles
discusses quantum theories of systems with variable numbers of particles. Basics of the Fock
space and quantum electrodynamics are covered with an emphasis on renormalization. In contrast
to the usual treatment of the topic particles (rather than fields) are chosen as basic
ingredients. Contents Fock space Scattering in Fock space Quantum electrodynamics
Renormalization Useful integrals Quantum fields of fermions Quantum field of photons QED
interaction in terms of particle operators Relativistic invariance of QFT Loop integrals in QED
Scattering matrix in (v c)2 approximation Checks of physical dimensions
