The publisher's summary:
Genevieve Sturbridge was never meant for a quiet life in the English countryside. Once an artist in the heart of London, she now spends her days in restless solitude. But when a familiar figure from her past arrives with an urgent request, she is thrust into a perilous world of spies and a formula that could shift the balance of power between France and England.The thrill of the chase is intoxicating—the cryptic clues hidden in plain sight, the challenge of ferreting secrets from dangerous opponents, the undeniable rush of being needed again. But with every step deeper into the mystery, the danger grows. Someone is watching. Someone is hunting. And the more she uncovers, the more she wonders: Has she walked willingly into a trap?
The story started out well but as I reached Part 2, I wondered when art and pigments would enter the plot. Almost simultaneously with my thoughts, Genevieve is asked to return to France to investigate who is using the forbidden blue color that her husband created. While there, Genevieve will do a little spying for her country.
I was disappointed with the book. It is advertised as a historical thriller but it isn't a thriller. I would categorize it as a historical mystery; a good one. A big part of my disappointment was the extremely high expectations that I held. Each of the author’s earlier eight novels were spectacular. Another blockbuster was expected. That said, it is a fairly good mystery. I would not want this installment of the series to be the end though. I believe that the series is only three books and, if so, The Versailles Formula is not the best ending. Another problem I have is that the story wasn't about the chemical formula for blue but rather the possibility that it is being misused. It took alot of pages before the identity of this mystery was given.
Approximately one third of the book gave background information from the first two books. It was done well with equal amounts of dialogue and narrative but unless you've read those books, the level of drama from the backstory is missing. Also, Genevieve's career as an artist is not part of the plot. That's a departure from the earlier two books in the series.
Enough with the negatives. What is positive about the book? Genevieve and Captain Howard's mission in France was fraught with plenty of twists and I was often afraid for both of them. It didn't appear that they would succeed in their quest to determine who was using the forbidden blue color. Almost daily they were accosted by enemies of England but the two were not always aware of the identity of these enemies. Part of the mission was to figure out who was who. If they could return to England with the name of the forger of blue then they were successful. Along the way these two met interesting Frenchmen who added "color" to the story. Pun intended.
The book reads like a historical spy story. However, my impression of the series was something else. If this was a standalone novel I would rate it highly. It is part of a series, though, so I can only rate it based upon this fact. 3.7 stars out of 5 stars.