Read this maybe in 2015-2018. The general plot is that the main character wants to reach this house/place that controls everything. I recall the setting being similar to an overpopulated pre-industrial era city. I may be wrong about this though. Along the way, he has to travel to all sorts of different places and meet very fantastical creatures/people. If I recall correctly, the house was on top of a hill or a mountain that was filled with all sorts of traps and trouble.
There are a few characters I remember, one specifically was a lizard/reptile creature that is intelligent and well-spoken when in the darkness but becomes a savage animal when there is light. There is another character, I believe the antagonist of the book, who is also trying to make their way to the house and there are many copies of the antagonist all trying to do the same thing.