A Song of Fire and Ice : House of God

Tag along and read the adventures of Konrad, a Teutonic knight who is reborn into the world of ASOFOI as the firstborn son of Jon Arryn, two years before Robert’s Rebellion. At the young age of three years old, Konrad is kidnapped by one of Prince Rhaegar's friend , who wants to protect him from what his visions told him would be the end of Jon Arryn's legacy and the safety of Westeros.
Mad might he be, but Rhaegar would rather trust his visions than anything his father's council might say and because of that people will die while others might survive.