Game of Thrones: Lord of Winter

[Game of Thrones Fanfiction]
The baby who was replaced by a cat in the War of the Usurper,
The cook who grew up on the Wall.
Aegon Targaryen, this name brought conquest and will also bring revival.
A soul from Earth traveled to the body of the eldest son of Prince Rhaegar.
He will ride a dragon and rule the world again.
ps: This book is also known as "I Have an Auntie Dragon Mother" and "My Half Brother is the Lord Commander of the Night's Watch"