  Book Review of Quantum Field Theory by Lewis H. Ryder. An observation on
Ryder's derivation of Dirac equation is made. The review ends as, "A rare
combination of a thorough understanding and appreciation of the essential
logical structure of quantum field theory and deep pedagogic skills have
intermingled to create a masterpiece on the elementary introduction to quantum
field theory in less than five hundred pages... . Without reservations, I give
my strongest recommendation to every beginning student of physics to acquire
and read Quantum Field Theory by L. H. Ryder."
