Think and Grow Rich by Napoleon Hill was published in 1937 after two decades of research into the success habits of over forty millionaires. This research started as a challenge from steel magnate Andrew Carnegie, leading Hill to formulate 13 principles that he believed were the blueprint for personal and financial achievement. The book emphasizes the power of personal beliefs and the importance of a positive mental attitude, proposing that success begins with the mind and a fervent desire.

"The Big Leap: Conquer Your Hidden Fear and Take Life to the Next Level" by Gay Hendricks is a transformative self-help book that delves into the concept of limiting beliefs and how they prevent individuals from achieving their full potential. Hendricks' work is centered around the idea that people have an internal thermostat setting that determines the amount of love, success, and creativity they allow themselves to enjoy. When they reach this upper limit, they sabotage themselves, thereby preventing further success or happiness. Hendricks calls this the "Upper Limit Problem.

"You Are a Badass: How to Stop Doubting Your Greatness and Start Living an Awesome Life" by Jen Sincero is a motivational self-help book that encourages readers to embrace their inner power, overcome self-doubt, and pursue the life they desire.

The Universe Has Your Back is a self-help book by Gabrielle Bernstein. I enjoyed the book as I am always looking for ways to improve myself and be a better person to those around me.  If I learn one new thing from a book, I feel it is money only worth spent. I will devour self-help books pretty quickly. This book being no exception with completing in a few days!