Mistwood Series by Leah Cypess

 

The Shifter is an immortal creature bound by an ancient spell to protect the kings of Samorna. When the realm is peaceful, she retreats to the Mistwood. But when she is needed she always comes.

Isabel remembers nothing. Nothing before the prince rode into her forest to take her back to the castle. Nothing about who she is supposed to be, or the powers she is supposed to have.
Prince Rokan needs Isabel to be his Shifter. He needs her ability to shift to animal form, to wind, to mist. He needs her lethal speed and superhuman strength. And he needs her loyalty—because without it, she may be his greatest threat.
Isabel knows that her prince is lying to her, but she can't help wanting to protect him from the dangers and intrigues of the court . . . until a deadly truth shatters the bond between them.
Now Isabel faces a choice that threatens her loyalty, her heart . . . and everything she thought she knew.

 

A stand-alone companion novel to the much-acclaimed MISTWOOD. When Darri rides into Ghostland, a country where the living walk with the dead, she has only one goal: to rescue her younger sister Callie, who was sent to Ghostland as a hostage four years ago. But Callie has changed in those four years, and now has secrets of her own. In her quest to save her sister from herself, Darri will be forced to outmaneuver a handsome ghost prince, an ancient sorcerer, and a manipulative tribal warrior (who happens to be her brother). When Darri discovers the source of the spell that has kept the dead in Ghostland chained to this earth, she faces a decision that will force her to reexamine beliefs she has never before questioned - and lead her into the heart of a conspiracy that threatens the very balance of power between the living and the dead.