Since I don't know the exact 'the ultimate life novel', it could also be a story that explores different aspects of life from a very unique perspective. It may focus on the spiritual side of life, or it could be a very realistic portrayal of the modern - day challenges that people face and how to overcome them to reach a state of ultimate living. It might even be a science - fiction or fantasy take on the concept of the ultimate life, with elements like time travel or magic being used to enhance or change the course of a character's life.
I'm not sure specifically which 'the ultimate life novel' you're referring to. It could be about an extraordinary life journey, perhaps filled with adventures, self - discovery, and personal growth.