Rewriting Targaryen History

Heinrich Adler lived a lonely life in Dresden, finding more comfort in books than people. His greatest obsession was House Targaryen and the Dance of the Dragons, a tragedy he believed could have been avoided if someone had known what was coming. Then he dies. Waking in the world of Ice and Fire, Heinrich finds himself in the body of Othorion Galeris, a young Valyrian-blooded sellsword and Captain of the Dread Legion. Armed with knowledge of the future, he sees a chance to change history before the dragons dance and House Targaryen destroys itself. But Westeros is dangerous, and changing fate may cost more than he expects. This time, history will not go unwarned. — Description from novelcodex.org