I'm currently reading "Design with operational Amplifiers and integrated circuits" by Sergio Franco and it's one of the best I've ever experienced. It has very in depth study of loop theory and op amp design. Very useful for today's electrical (system) engineers.
~Chris Gammell...
I like National Semiconductor's Analog University for an online reading place. They have some good materials on their site.
As for top-down as opposed to fundamental learning, I like books like the Art of Electronics by Horowitz and Howe. The fundamentals are covered mostly in the first chapter...
