If you are a beginner, buy the physical book. It hurts your back carrying it, but it trains your brain to focus. If you are on a very tight budget and have a tablet with a stylus, go for the official Kindle/Google Play edition.
The author doesn’t just teach economics; he teaches it from the perspective of an exam. You will find "A Word for Aspirants" boxes scattered throughout the chapters, directly linking theory to current events and government schemes. Indian Economy By Ramesh Singh PDF
The book starts from the basics (GDP, Inflation, Monetary Policy) and gradually builds up to complex topics like the Banking Crisis, Fiscal Deficit, and the Union Budget. It explains why the rupee falls, not just that it fell. If you are a beginner, buy the physical book