I would divide this book in 3 parts.
In the first part you have the travels of a pair young cousins, who are super naive, a bit gay and extremely boring, they find an artefact the same way you could find some coins on the floor and they flee the region when war erupts because they are sons of nobles who want them safe. You are also introduced to the machinations and actions of some power groups and other characters.
I nearly abandoned the book in this part.
In the second part you are introduced to 10-20 more power groups and some adventures in a city, it's less boring but not very interesting, up to this point is like a super slow introduction to the different characters, world and story, the best thing is that some protagonists join.
The third part is the interesting one, the story starts to unravel, I could care less at this point about the protagonist couple but at least the plot seems to be moving somewhere with them. The rest of characters are cool, their plots are better and they start doing interesting things that could have important consequences for the world. I really enjoyed this part but it ends with different cliffhangers and I'm not sure if the author will finish the trilogy?