The covers of the Pink books have all been based off existing paintings. For those who have been curious about the artwork, here is a complete list of the paintings and painters from Pink Carnation through Mistletoe.

The Secret History of the Pink Carnation
Augustus Jules Bouvier, "Lady Holding Flowers in her Petticoat"

The Masque of the Black Tulip
Francois Martin-Kavel, "A Summer Rose"

The Deception of the Emerald Ring
Franz Xaver Winterhalter, "The Marquise of Montebello"

The Seduction of the Crimson Rose
George Romney, "Emma, Lady Hamilton as Circe"

The Temptation of the Night Jasmine
Charles Sillem Lidderdale, "At the Garden Gate"

The Betrayal of the Blood Lily
Pompeo Batoni, "Purity of Heart"

The Mischief of the Mistletoe
Francois Martin-Kavel, "Jeune fille au manchon et à la branche de houx"