The book provides a good overview of Uber's history, controversies and challenges.
Kudos to the author for trying it himself and becoming an Uber driver, showing that this occupation brings little money (certainly not enough to live on) for more hassle ("it's certain that someone will vomit in your car during a ride ...", etc). Who would want to become an Uber driver then? It would need some desperation, adventurousness or may be having access to someone else's car and having enough free time.
Uber probably considers its drivers as a temporary necessary evil, before going full-on with driveless cars. So in a longer term even those little-paying precarious jobs currently provided by Uber to its drivers will be gone.