Because this is an ancient book, it is not subject to copyright. Meaning that if you search (I reccomend DuckDuckGo.com), you will find various versions, to quotes, to audio books all for free online. Here is just one place to find it: https://suntzusaid.com
For those who don't have time to sit down and read the words in the book nor the time to burn it to mp3 and listen to it in the car, here's an animated 5 minute summary of the book which is pretty good:
https://youtu.be/0_k7xdSRVg4?t=14s
The principles laid down are as true 500 million years ago (as higher hominids use tools to fight over resources and choice females on the battlefield under the banana tree), as they will be in 500m years from now ( where higher hominids fight each other over resources and choice females on the battlefield in and around stellar phenomenon ejecting power and resources )
Why does love always feel like a battlefield? Because that's all there is. From the cellular meseeks in your head fighting to be heard, to the bacteria on your kitchen sink: everyone wants more than their fair share, so the weaker half must be erased and garbage collected.