Hi all. First year physics student here. I'm doing very very well in my course at my Uni (A++ after first midterm) I study by doing an insane amount of problems from 2 books. Both are about the same difficulty to me (Halliday, and the other is Young) is there a book anyone knows of that might be like a notch up to maybe challenge myself more? My math background is I've finished single variable calc, just starting multivariable. Also just starting linear algebra.