The fact I only give this three stars is no reflection on the writing, more because of what it is.
Billed as a novella, this is actually a long prologue for the author's novel "The Scarlet Club". There is little depth added to the characters, especially Mason Cooper, the nominated hero. Taking Natasha is more a scene setter, outlining context and creating a scenario for the full novel(s) to follow.
It was enjoyable and a fast read (I cleared it in one day, reading either side of the World Cup Final!). It certainly did its job in making me want to read the novel, which is already sitting on my Kindle waiting. I can see the characters have potential, and the subject matter is very well dealt with.
Don't read this expecting a full story with an ending, because that is not what you get. Do read it as a taster (for free, by the way), to see if you want to go ahead and read The Scarlet Club.