Mankiw’s textbooks are famous for boxes like "Why has productivity growth varied?" or "The Great Depression." These are frequently used for exam essays.
While the macro book focuses on aggregates, Mankiw grounds everything in his famous 10 principles (e.g., People face trade-offs; Rational people think at the margin). This logical flow helps students move from micro-foundations to macro-outcomes.
Macroeconomics is visual. In your PDF, screenshot or print the blank versions of the AD-AS graph, the Money Market graph, and the Loanable Funds graph. Practice shifting the curves 10 times per day until it becomes muscle memory.