I am studying for my junior level EM final that is a few weeks from now, we are using Griffiths' Introduction to electrodynamics. To prep for the test I am already planning on working through all of our homework problems, and examples in relevant sections, as well as a few problems we didn't do for our homework. I want to work as many problems as possible so I am looking at possibly getting the Schaum's outline for EM for as a source of problems that isn't from Griffiths' book. Does anyone have experience with Schaum's outlines on this subject? How does the difficulty of problems in Schaum's compare to those found in Griffiths? If you have alternative sources that you would recommend I am open to anything that helps me study.