A magical take on the rise and fall of Marie Antoinette and the coming of the French Revolution, Heartfield spins a tale of devoted sisters, spells and the struggle to survive.

'Power is not something you are given. Power is something you take. When you are a woman, it is a little more difficult, that's all'

1768. Charlotte arrives in Naples to marry a man she has never met. Two years later, her sister Antoine is sent to France to marry another stranger. In the mirrored corridors of Versailles, they rename her Marie Antoinette.

But the sisters are not powerless. When they were only children, Charlotte and Antoine discovered a book of spells - spells that seem to work, with dark and unpredictable consequences.

In a world of court politics, discovery and change, Charlotte and Antoine use their secret skills to redefine their lives, becoming the most influential women of the age.

But every spell requires a sacrifice. As love between the sisters turns to rivalry, they will send Europe spiralling into revolution.