Next semester I begin studying analytical mechanics. The book they use in class is Thornton and Marion "Classical Dynamics of Particles and Systems". I wanted to read something about this during the summer, and stumbled upon Lanczos' book " The Variational Principles of Mechanics". Lanczos' book has great reviews and talk a lot about how it really makes you understand stuff. I was afraid that it might a little bit over my level though. What do you suggest? Should I read the book used in class (Thornton) or should I have fun with Lanczos? Or should I read both, hehe? https://www.amazon.com/Variational-Principles-Mechanics-Dover-Physics/dp/0486650677 You can see those reviews for yourself by following the above link.