On: Ask HN: How to self-study mathematics from the und...

[nabla9]

You need to do lot's of exercises.

Shaum's Outlines has lots of cheap math books with exercises and solutions. You can use them to complement other books

https://www.mhprofessional.com/9780071623667-usa-schaums-out...

https://www.mhprofessional.com/9780071635349-usa-schaums-300...

https://www.mhprofessional.com/9780071383929-usa-schaums-out...

https://www.mhprofessional.com/science-math/math/topology