The fluorescent lights of the university library hummed in a low B-flat, a constant drone that competed with the rhythmic scratching of pen on paper. Elias sat at a corner mahogany table, surrounded by a fortress of engineering textbooks, but his eyes were fixed on a single, battered spine: Analog Communication by V. Chandrasekhar.

It covers traditional modulation (AM, FM), pulse modulation, and even a brief introduction to digital communication, as noted in the official OUP description.