I'm reading Zee's QFT as self-study and have had trouble with the applications of group theory in Section 2. I'd love a book recommendation to fill in my gaps. I took algebra in the math department, but there groups were structures to distinguish from rings and such by definition, with no regard to matrix representation. I've read the group theory chapter in Atkins's "Molecular Quantum Mechanics," but it didn't get me far enough in understanding the offhand references here to, say, the appropriate cyclic permutations of a 4 x 4 matrix. Obviously I don't mean a comprehensive, difficult, separate book on quantum theory from a group-theoretical point of view such as Weyl's. Thank you.