I would recommend looking not only at books, but at online video lecture recordings (from reputable sources). There is so much intuition you get from someone ac

I would recommend looking not only at books, but at online video lecture recordings (from reputable sources). There is so much intuition you get from someone actually discussing and problem-solving in front of you, not to mention (especially in higher pure mathematics at least) a lot of intuition which is spoken or drawn on the board, which never makes it into a book.