One of my children is a maths undergrad (UK) and all their texts are on-line too. He's in a minority in that he uses the library and borrows books. Many of his

One of my children is a maths undergrad (UK) and all their texts are on-line too. He's in a minority in that he uses the library and borrows books. Many of his cohort don't. On one hand, I remember how costly textbooks were and I'm glad he doesn't have that. But I still have some of my student textbooks and its interesting to flip through them and see old margin notes, and consider what has and hasn't changed over thirty years.