Find below some of the good books for ECE (Electronics and Communication Engineering). There could be some more good books and the list can also vary from person to person. The intent is to give you an idea of the level of quality we were talking about.
Electronics and Communication
Networks: Network graphs:
Network Analysis - Van Valkenburg
Network Theory - Shaum’s outline, Robbins and Miller
Network Theory - Shaum’s outline, Robbins and Miller
