From A Wiki of Ice and Fire
|Book(s)||A Game of Thrones|
Grand Maester Malleon wrote a book on the lineages of the Seven Kingdoms. It was called The Lineages and Histories of the Great Houses of the Seven Kingdoms, With Descriptions of Many High Lords and Noble Ladies and Their Children. Jon Arryn and then Eddard Stark used the book to discover the identity of the true father of Robert Baratheon's children.