It's near-future SF, set after the melting of the Arctic ice cap. More accessible and adventure-oriented than Kim Stanley Robinson's brilliant Science trilogy, it is exactly the kind of climate change book that I want to see on bestseller lists, getting international attention, and generating discussion about the world he's portrayed and the futures we're looking at.
That sounds very high-falutin', so let me also say it this way: when the worrisome McGuffin was revealed, I actually gasped out loud. That's how involved I was in the stakes Tobias had set up, and in the characters he'd developed. I couldn't tell you the last time a book made me gasp like that. I not only liked the main character and the supporting cast very much, but *loved* the portrayal of the bad guy, whom I found utterly believable.
You all know climate change is a hot topic for me, having grown up in Alaska where the effects have been achingly visible. Tobias is Caribbean, and is, I suspect, similarly motivated on the topic: low-lying island countries, like Alaska, already seeing the effects of climate change. The future as he's envisioned it seems painfully possible to me, for good and for ill. A very good book!