"Barron's AP Physics C (2020) 5th Edition" by Pelcovits and Farkas
Chapter 11 - Coulomb's Law and Electric Fields Due to Point Charges
MCQ #2, 4-5, 7
FRQ #1-4
Chapter 12 - Calculating Electric Fields and Potentials Due to Continuous Charge Distributions
MCQ: #2, 4, 5
FRQ: #1-2
Chapter 13 - Gauss's Law
MCQ: #8
FRQ: none
(even though you've already read Ch13, one of the MCQ involves potential that was skipped last unit)