Hands down The. Best. Book. Ever. Each penny is well spent on it and every line contains so much knowledge the book is so denser oh my god and after reading the book, your thought process and perspective will change so much and you will make so manyyy new theories, it's literally the greatest book, buy it right now!! Worth spending your time & money on! Bought it for ₹300 on Amazon so ₹149 is a great deal considering Freeup deducts 30% of the earnings too. I have posted many other books too, buy a combo order and save a lot with discounts and delivery offers