The far north setting is well-described, although given how long this winter has been, I wish they had ventured south! There are a variety of animals, some of which are helpful and some, like Toothwalkers, which are terrifying. The bears do a lot of fishing and even kill some seals to eat, but are always respectful of their place in the food chain.
There will no doubt be more details about how the bears got involved with keeping clocks and with doing calculations to assure that the north will stay cold. The ghosts of the bears could also use a little more explanation, but we are learning about all of these things along with Jytte and Stellan. There are also sure to be battles to come as they rescue their mother and try to take down the evil Roguers.