Your own previous comment doesn't match this take: https://news.ycombinator.com/item?id=21218385
A book is just a list of words.
If you compile a word list yourself, you've created something that doesn't describe the factual state of the world; you've created something new.
FWIW, before the debacle, even the (apparent) author of it appears to have admitted that it flaunted copyright:
> FWIW, I have reverse-engineered the what3words address decoding algorithm. If anyone else with the luxury of flaunting patents and copyrights is curious, check out the demo at https://cardinalhood.github.io/what3words/. It’s written in JS, and runs in browsers and Node.js.
https://blog.ldodds.com/2016/06/14/what-3-words-jog-on-mate/