The React Handbook follows the 80/20 rule: learn in 20% of the time the 80% of a topic. I find this approach gives a well-rounded overview. This book does not try to cover everything under the sun related to React, but it should give you the basic building blocks to get out there and become a great React developer.
In case anyone wants to get into React, Flavio has written a great post on Freecodecamp. He covers basics as well as advanced topics.
I'm more of a fan of Vue.js, but it will certainly be useful for me at some point.