The true queen

"In the follow-up to the "delightful" Regency fantasy novel (NPR.org) Sorcerer to the Crown, a young woman with no memories of her past finds herself embroiled in dangerous politics in England and the land of the fae. When sisters Muna and Sakti wake up on the peaceful beach of the island of Janda Baik, they can't remember anything, except that they are bound as only sisters can be. They have been cursed by an unknown enchanter, and slowly Sakti...