This book is amazing, I've been using it with my freshman electromagnetism course and it's remarkable the aproach that Feynman gives to the subject. You will need a little background to start with the first volume but the introduction is so great and there are some chapters dedicated to explain some of the mathematical tools that might be needed through the lectures. However I'm not giving the fifth star because the red box came with a little crack in the front, not too much to complain but is a thing.