The author describes three basic needs people have. He claims that satisfying them and being aware of that can grant us happiness. It's all about our attitude!
To find out more, go to https://pdulski.com/en/
See the trailer of Paul's book "The inner fight": https://www.youtube.com/watch?v=0HoOwAzw_nY&t=1s
You can buy his book here: https://pdulski.com/en/e-book/