The 18 Best Fantasy Romance Books

"Throne of Glass" ($12, originally $19), the first book in Sarah J. Maas's seven-book series, follows the journey of Celaena Sardothien, a teenage assassin in a corrupt kingdom with a tyrannical ruler, the King of Adarlan. Imprisoned for murder, she enters a competition to become the king's new royal assassin, and must defeat 23 other killers, thieves, and warriors. But when her competitors start dying due to an unknown evil, Celaena must root it out in order to survive, and save the kingdom.