Now, I have to say, google AI doesnt seem to be helping.
It just says "his book says "Do what you really want"", and I am sure there is much more in that book, so I kept asking AI, and it finally said that it teaches not to impose your will on others, but only on yourself, and to liberate yourself from limits imposed by society and others onto you.
Apparently, the book was revealed to him by the entity named Aiwass, which is a cool name for an entity, and its motto was "Do what you want".