It's available to read online, but we've also made a [pdf/epub/mobi/..] so you can read it on the thing. We're thinking we might make physical copies of it next year.
https://100r.co/site/no_bears_none.html
We have the source available online too, if you've ever wondered how we make our books, it's a bit complicated but if you'd like to look around:
https://git.sr.ht/~rabbits/vicsitka/tree