Celine Jeanjean develops a story with enough mystery and suggested potential romance to keep the reader awake all night long. She's visibly worked a lot to document and render the musical part and spirit, as well as to put us in the shoes of an autist lady in victorian London.
Although it takes a bit too long to get acquainted with the main characters - the story starts to unravel only in chapter 5 - that gives the reader ample time to try to guess how the 3 protagonists we first follow will eventually meet.
Once in the opera, you get captivated, all the more so if you like classical music and science infused with mystery.
I give it only 4 stars because of the too lengthy introduction in the Music & Mirrors world.