3 ms·Look for Dover books, particularly from Russian authors. Cheap and good!by abhinav22 6y agoLook for Dover books, particularly from Russian authors. Cheap and good!Tomte 6y agoFor linear algebra: Shilov.abhinav22 6y agoI own four copies of that book :-) Two hard copies since I moved countries, one on kindle and one on Apple Books. Great book :D