I love that you use "fantastic creatures" to describe the world of Jansson, but "warriors" to describe Tolkien. Last time I checked, it had hobbits, dwarves, elves, talking trees... but none of that fantasy nonsense of Moomintrolls, right?

There are some seriously dark themes in there - and unlike in Tolkien, the protagonists are completely helpless when facing them. No epic battle in which magical eagles and a magical bear show up to save the day.