This is a hard one to recommend as it really depends on your taste. Especially since it's a long book, make sure you know what your getting into before starting. 
 As a child Baru Cormorant witness the Empire of Masks conquer her homeland. Not through war but with economics, trade policies and cultural assimilation. Baru vows to tear down this empire from within by pretending to be loyal to gain power. Will Baru be able to avoid corruption that comes with power, can she stand by and not only watch, but be the instrument of the empire in conquering another culture, or join their rebellion at the cost of her revenge. Will her outlawed secret desires be discovered? 
 It reads like a text book on colonialism. It covers in extreme details everything from economics, taxes & trade policies, cultural assimilation, diplomacy, naval & land battles, and family lineage. Often times it feels like the narrative is secondary to allow the author to show us the vast world he has created. 
 Personally, while I found most of the technical details interesting, and presented with purpose, it started to bog me down and become tiring around the last third or quarter. I really liked the ending, I can't say anything about it without spoiling it but it reminded me of a classic story whose ending I also really liked. I can't say which classic without spoiling. 
 Read if you're REALLY into world building, how things work behind the scenes in terms of politics, bureaucracy and economics. If you read all the in game lore you can find in video games, then give this a read.