Is Swift (first edition) still relevant now?


#1

https://www.amazon.com/Swift-Programming-Ranch-Guide-Guides/dp/0134398017/ref=sr_1_fkmr0_2?s=books&ie=UTF8&qid=1512470364&sr=1-2-fkmr0&keywords=big+nerd+ranch+swift+first+edition

Is this book still relevant for learning Swift ?

Or this book is too outdated ?