That is my go-to link for self-study. You can also get most non-free textbooks cheap second-hand, by asking to borrow from a university prof (they tend to have a collection of older versions), or downloading them off libgen and clones. Plus the usual MIT OCW, edX and such.
That is my go-to link for self-study. You can also get most non-free textbooks cheap second-hand, by asking to borrow from a university prof (they tend to have a collection of older versions), or downloading them off libgen and clones. Plus the usual MIT OCW, edX and such.
Cheers.