As others have noted, it sounds like what you're really interested in is particle physics. In that case, I'd recommend Griffiths's "Introduction to Elementary P

As others have noted, it sounds like what you're really interested in is particle physics. In that case, I'd recommend Griffiths's "Introduction to Elementary Particles", which would be accessible to someone with an undergraduate level knowledge of physics. But you could probably get away with knowing less, depending on your background.