Books like Signals and Systems
Alan V. Oppenheim, Alan S. Willsky
Signals and Systems is 828 pages, about 15 hours 11 minutes at 250 words a minute.
6 books to read next
How long each takes
Signals, Systems and Communication 11.1 h 
Systems Engineering and Analysis 14.7 h 
Modern Systems Analysis and Design 11.9 h 
Theory and Application of Digital Signal Processing 16.7 h 
Communication Systems 13.5 h 
Analysis and Design of Information Systems 15.6 h Bar height shows length. Estimated at 250 words a minute.