Think and Grow Rich has been recommended by several friends and I read it in 2019 together with a mastermind group. It is no surprise that it is so popular and frequently recommended. It contains so much information, it will take several re-readings to absorb the content and put it all into action.
The Richest Man in Babylon is written in story form; fun to read and easy to understand regardless of your financial education. It's a concise book and hard to put down once you start reading. The key concept is "Money is plentiful for those who understand the simple laws which govern its acquisition."