The half-drowned king

"The first installment in a debut trilogy, THE HALF-DROWNED KING tells the compelling story of the political intrigues, battles, and struggles for power that led to the rise of King Harald the Fair-Haired, first king of Norway, seen through the eyes of the young man who became his most trusted warrior and advisor. Conjuring a bloodthirsty, superstitious, and thrilling ancient world (9th century), this debut novel is for fans of Game of Thrones, the Vikings TV series, and Outlander"--