The Versailles Formula (Genevieve Planché #3)

Genevieve Sturbridge has left the dangers of London for a quiet life in the countryside with her husband and young son. But when she is invited to a dinner party at Sir Horace Walpole’s magnificent Gothic estate, she is drawn into a terrifying web of deception, espionage and murder.

At the mysterious dinner party Genevieve makes a shocking discovery — a secret pigment of the deepest, purest blue is being produced once more. The formula is so rare, it’s the obsession of chemists, royalty, and spies.

Some will kill to possess it. Others will kill to keep it buried.

Only Genevieve can recognise the formula and stop it falling into the wrong hands. But when a ghost from her past resurfaces, Genevieve must determine who she can trust. Years ago, this secret nearly cost her and her husband their lives. Now, someone is willing to kill for it once more.

Genevieve must discover the truth before time runs out, because this time the price of failure will cost more than just her own life.