From the reviews: "This short book is about single-variable Fourier series and transforms with a total emphasis on signal processing ... . Each chapter ends with a number of exercises (solutions are at the end of the book). Students with the persistence to finish the exercises without looking at the answers will have learned a lot ... . The book's ... focus is unusual and may be a reason for the success of the German editions." (Colin C. Graham, Mathematical Reviews, Issue 2006 k)