I was a technical reviewer for Learning Tensorflow.js book, and all I can say is: it's a great book if you want to learn how to create, train and run your models using Tensorflow.js in browser.
Personally, I don't have a ton of experience with Mobile Development and using Gant book I was able to fly through the content and learn a bit more about web development world, not only that but I was able to grasp the basic knowledge I need in case I'm developing a Website and want to run ML models within its ecosystem.
The book will take you through a journey from understanding Tensorflow ecosystem and where you can run it, to a look of practical and walk through scenarios of running it within your own web apps.