The Constant Queen by Joanna Courtney
Elizaveta is princess of Kiev, but that doesn't stop her chasing adventure. Defying conventions, she rides the rapids of the Dneiper alongside her royal brothers, and longs to rule in her own right as a queen.
Elizaveta meets her match when the fearsome Viking warrior Harald Hardrada arrives at her father's court seeking fame and fortune. He entrusts Elizaveta to be his treasure keeper, to hold the keys to his ever-growing wealth - and eventually to his heart.
Theirs is a fierce romance and the strength of their love binds them together as they travel across the vast seas to Denmark, Sweden, Norway and Iceland. In 1066, their ambition carries them to Orkney as they plan to invade England and claim the crown . . .