George.S. Clason's book is indeed a classic, financial lessons are passed across through creative writing.
The first lesson it passes across is the desire to make wealth. Wealth creation starts from a desire to want to be rich or wealthy, it is the desire that sparks up the intention to be different, to want all the good things of life. Without this desire, man will be content with whatever he has.
Another lesson so subtly and creatively passed is the search for knowledge. Bansir, the man who seems to have started the book as well as having the desire to make wealth tells his sorrows to a friend Kobbi, who advises they go in search of knowledge from the richest man in their city, Babylon. So the other lesson is not really saving money, but learning from someone—who walks the path with results to show for it— how to save money.
The lessons to be taught follow a sequence, desire first, and then search for knowledge, which births other rules from savings to investing and even settling of debts.
The Richest Man in Babylon is creatively written, with stories weaving through the lessons, especially with the first story of Babylon which might capture the interest of any reader.
A setback in the book will be that it is written in Middle English of the King James version of the Bible which might discourage Modern English speakers.
But overall, it is a good financial book that will really help many in their finances.