Electrical engineers study a fair amount of hypothesis testing (as well as estimation) at the graduate level, and there are many textbooks geared towards the applications (signal detection, signal parameter estimation, statistical signal processing) that interest EEs. Many of these books do exceed 300 pages in length (though not all the pages are devoted to hypothesis testing).
Here, for example, is the Books on Reserve in the Library for
the Spring 2015 offering of ECE 561: Detection and Estimation Theory
at the University of Illinois at Urbana-Champaign
Levy, B.; Principles of Signal Detection and Parameter Estimation
Poor, H. V.; Introduction to Signal Detection and Estimation 2nd ed.
Van Trees, H. L.; Detection, Estimation, and Modulation Theory, Vol. 1
Kay, Steven M.; Fundamentals of Statistical Signal Processing: Estimation Theory v.2
Kay, Steven; Fundamentals of Statistical Signal Processing vol.1
Lehmann, E.L.; Testing Statistical Hypotheses 2nd ed.
Wong, E./Hajek, B.; Stochastic Processes in Engineering Systems
I suspect that only one of these books will be familiar to (or
immediately recognizable by) the
cognoscenti of this site.