Katznelson Y. An Introduction to Harmonic Analysis

Dover Publications – 1976, 299 pages
ISBN: 0486633314, 9780486633312This concrete approach to harmonic analysis begins with the circle group T and deals with classical Fourier series in the first five chapters, turning to the real line in chapter six, locally compact abelian groups in chapter seven, and commutative Banach algebras in final chapter.