The Essence of Malice

If my husband didn't die attempting this foolishness, I was going to kill him myself.
When Milo Ames receives a troubling letter from his childhood nanny, Madame Nanette, he and his wife, Amory,
travel to Paris where they are soon embroiled in a mystery
surrounding the sudden death of a famous parfumier.
Helios Belanger died shortly before the release of his newest,
highly anticipated perfume and Madame Nanette is convinced
her employer’s death was not due to natural causes.
As Amory and Milo investigate the motives of industry
rivals and the Belanger heirs, secrets unfold and danger
surrounds them. Can the pair uncover the essence of the
matter and catch a killer before the scent goes cold?