The Girl Who Walked Through Fire. The Dragonwitch Chronicles, #1

One girl. One epic destiny. After eighteen-year-old Elara Everly-a peasant girl from a small village-saves a boy from a house fire, she discovers she's immune to the flames. Born with a strange birthmark-a dragon pentacle and a witch symbol-her father has kept her hidden all her life. Meanwhile, King Angus-the ruthless king of Meridian-seeks war against the dragons and witches for being dangerous.
The Fallen Ones, an evil group of dragons and witches, combine their powers to destroy human cities in retaliation for all the brutality they've faced. When Elara ventures to the city of King Angus' power, her birthmark is exposed, and the king tells her she's the Dragonwitch-a girl with the power of all three races, destined to bring the world together. Fearing her power and influence, King Angus has Elara sentenced to death-only for the dragons and witches to save her life.
With the threat of the Fallen Ones trying to destroy humanity and King Angus' mission to imprison the two races, Elara must do the impossible-assemble an army of warring witches and dragons-to save their world. Book One in The Dragonwitch Chronicles trilogy