I'm looking for a good, intermediate economics textbook. I would like to get a few recommendations on intermediate/advanced economics textbooks that are well suited to self-study. I am particularly interested in macroeconomics and development economics. What are the standard books typically assigned in college courses? Which books have been particularly helpful in moving you from a beginner to intermediate understanding of macroeconomics? Also, books that have associated online content (quizzes, tests) are a plus.

I'm looking for a good, intermediate economics textbook. I would like to get a few recommendations on intermediate/advanced economics textbooks that are well suited to self-study. I am particularly interested in macroeconomics and development economics. What are the standard books typically assigned in college courses? Which books have been particularly helpful in moving you from a beginner to intermediate understanding of macroeconomics? Also, books that have associated online content (quizzes, tests) are a plus.