Even while reading this book, I was unsure how I was going to review it. It defied being defined early on and only every shook things up. Told over three generations (but 100s of years apart) it's a story about ecological rangers (and allies) who want a free planet and free people under their corporate owners. The only characters who stick around through all three eras are the rich elite, which is a powerful statement on its own. I've never read a book like this, focused on 'ranger issues' like how to deal with other peaceful settlements, how to ethically and ecologically build a mass transit system and how to deal with gentrification and corporate greed. A lot of the book takes place in meetings and discussions about infrastructure, in a way that I thought should have been boring. But the writing is top notch and I did end up loving all the characters (who are diverse in pretty much every way you can imagine, with some of the leads being flying moose and a literal sky train). I agreed with the ideas here, and appreciated the opening line when you meet new people across the world "Hey Friends!" which was very cute and didn't get old for me. This is a weird one, but I also enjoyed in a lot, in part for that weirdness.