Yes, intriguing and solidly written. I liked the build up in the early chapters which added question to question and left me wanting to find answers. This is a novel well worth persisting with. I think you need to get rid of some extraneous material, pare down the language to its bare bones. 'Suddenly' 'Now' unnecessary adverbs, passive tenses, modifiers, adverbial clauses which don't add much. It's not a huge job but it would make a big difference to the pace of the narrative. You need to be ruthless. It'll also help ease out some of the formality of the language which can be an obstacle.
Read the story now
All in all, though, well worth a bit of work. Those three stars will quickly become 4's and 5's.
I hope this is helpful.
Good luck with your writing.
In case it's of interest, this is the link to my own novel: