Ist book is think and grow rich by napoleon hill this author has interviewed 500 people and wrote this book in which formula are written to be rich

Second book is rich dad poor dad by Robert kyoski in this book it is described how rich and poor people has different approach to make money

Third book is the richest man of Babylon in which it is told how to save money and the principles to make money and in future how to be financially secure

Fourth book is the automatic millionaire which tells step by step plan for building wealth without being disciplined by relying on fixed percentages small payments and automated transactions all books have different mantras to be rich all must read