This looks like an index of Mir books, without any additional sorting or curation. You probably can get a good education on many topics out of these, but also waste significant time on reading out-of-date and out-of-order texts. Someone experienced could make this a lot more useful by proposing a reading order and giving some sort of evaluations of importance and quality.
And keep in mind that these are from the pre-1990 USSR, so don't expect any modern maths or CS.
And keep in mind that these are from the pre-1990 USSR, so don't expect any modern maths or CS.