lyons is a good intro but maybe a bit handwavey at times (although my copy is an edition from the 90s). consider maybe backing it up with one of the textbooks

lyons is a good intro but maybe a bit handwavey at times (although my copy is an edition from the 90s). consider maybe backing it up with one of the textbooks like oppenheim (the classic) or manolakis (one that i think i remember liking).