Stuart G. Yates 
Origins [EPUB ebook] 

Harald Hardrada is returning to his homeland.
Sailing north after escaping the clutches of the Byzantine Empress Zoe, he intends to claim his inheritance: Norway’s crown.
Danger has followed him like a close friend, and on the arduous journey home, he reflects on his life of adventure, tragedy and war. After joining the elite Varangian Guard, his wits and skills in combat have served him well.
But will they be enough to fend off the revenge of the empress?