This will not only be his journey for a solution of becoming mortal but will also turn out as a journey for his self as he discovers what is really in his heart as he comes at peace with his past. This was Ash’s point of view while searching for the impossible – a cure so he can come back and live with Meghan in the Iron Realm.

This is the last book in the series, Iron Fey. A truth that challenges his darkest beliefs and shows him that, sometimes, it takes more than courage to make the ultimate sacrifice. And along the way Ash learns something that changes everything. But the tests he must face to earn these things are impossible. To survive in the Iron Realm, Ash must have a soul and a mortal body. With the unwelcome company of his archrival, Summer Court prankster Puck, and the infuriating cait sith Grimalkin, Ash begins a journey he is bound to see through to its end – a quest to find a way to honor his vow to stand by Meghan’s side. Meghan is now the Iron Queen, ruler of a realm where no Winter or Summer fey can survive. And when all of Faery nearly fell to the Iron fey, she severed their bond to save his life. Then Meghan Chase – a half human, half fey slip of a girl – smashed through his barricades, binding him to her irrevocably with his oath to be her knight. His own love had died a horrible death, killing any gentler feelings the Winter prince might have had. To cold faery prince Ash, love was a weakness for mortals and fools. My fall began, as many stories do, with a girl… I am the last remaining son of Mab, Queen of the Unseelie Court. My name – my True Name – is Ashallayn’ darkmyr Tallyn.

The Iron Knight by Julie Kagawa