What textbook can I use to really understand microeconomics, macroeconomics and mathematical economics. It can be different textbooks. I'm in first year college taking introductory courses in microeconomics, macroeconomics and mathematical economics. I need a really good textbook or online site to understand what I'm studying well. I like the way people on this site answer and explain questions with application. I want to be like that too. I have Greg mankiw books by the way, I have schaum's introduction to mathematical economics. I need to read more quality books to understand.