The Queen of the Tearling by Erika Johansen
Princess Kelsea has been raised in isolation in the northern forest by her elderly guardians since her mother’s death eighteen years ago. The Queen’s Guards arrive on her 19th birthday to take her home to claim her throne, if they can keep her alive on the journey. A magical sapphire necklace she wears helps, but it doesn’t tell Kelsea who she can trust, or keep her from being injured. The nearby kingdom of Mortmesne is ruled by a sorceres, and she demands a tribute of Tearling citizens every month, or her army will invade the Tearling. Kelsea makes a bold decision to stop the tribute before she’s even crowned. This book is the first in a fantasy series set in the far future, and a movie is in development. I’m looking forward to reading Kelsea’s next adventure.