Eynhallow by Tim McGregor

ORKNEY ISLANDS, 1797 – Agnes Tulloch feels a little cheated. This windswept place is not the island paradise her husband promised it to be when they wed. Now with four young children, she struggles to provide for her family while her husband grows increasingly distant.
When a stranger comes ashore to rent an abandoned cottage, Agnes and the other islanders are abuzz with curiosity. Who is this wealthy foreigner and why on earth would he come to Eynhallow? Her curiosity is soon replaced with vexation when her husband hires her out as cook and washerwoman, leaving Agnes with no say in the matter. Agnes begrudgingly befriends this aristat-in-exile; a mercurial scientist who toils night and day on some secret pursuit. Despite herself, she's drawn to his dark, brooding charm. And who is this Byronic stranger sweeping Agnes off her feet? His name is Frankenstein and he's come to this remote isle to fulfill a monstrous obligation.