"Physics for Scientists and Engineers with Modern Physics (2018) 10th Edition" by Serway and Jewett
Chapter 23 - Continuous Charge Distributions & Gauss's Law
23.1 - Electric Field of a Continuous Charge Distribution
23.2 - Electric Flux
23.3 - Gauss's Law
23.4 - Application of Gauss's Law to Various Charge Distributions
14 pages