The Lightness of Being by Frank Wilczek is my latest read and a wonderful introduction to the field of QCD, that is to say Quantum Chromodynamics, which explains the internal structure of protons and neutrons .... that to say that of which all of us are made.
It's a delightful book and I recommend it. Frank was one of the founders of the field as a grad student in Princeton, and once this theory was developed The Standard Model of particle physics was developed soon after.
So if you like quarks and gluons but can't seem to "get it", Wilczek's wonderful elucidation and amusing sense of humor will get you far closer than you've ever been. I'm glad I bought it.