Textbooks with pretty well. I’ve learned almost all my math and science from textbooks. The concepts build on and reinforce each other. I imagine this is har

Textbooks with pretty well. I’ve learned almost all my math and science from textbooks. The concepts build on and reinforce each other. I imagine this is harder to do for the class of books he mentions which don’t really get built on or reinforced except when you try to recall them to a friend.