This book is amazing. It teaches you to think like a physicist (I would imagine, can't be sure but I'll get there one day!). It may not help you perform the calculations you will inevitably encounter in your problem sets at uni, but it opens the doors to higher physics. I had gone through a course in quantum mechanics that touched on field theory and I was so confused about not only the connection between these theories but I was confused about the fundamentals of each independently. Most importantly, I think, I could not work with Lagrangians. They had never been explained to me properly (thanks, Phys 310) and also special relativity was never covered in my electrodynamics class so all I knew about it was time dilation and length contraction. The book is so valuable because you see how special relativity and lagrangians work and how theories are built with them.