Blood Challenge — Kit Fawkes

Corsova, a tiny country in Eastern Europe, is the last safe haven for the paranormal races of the world.

Ellie is a social anthropologist intent on studying the people of Corsova. When her plane crashes in the mountains, she's rescued by a group of people who call themselves the Pack. When she discovers they're a community of wolf-shifters, she's determined to publish her study and write her own ticket at her university department. Nothing will stop her...until Rica claims her as his mate.

Corsova Chronicles is a series, with each standalone novel focusing on a different couple or triad. It isn't necessary to read each volume of the series, but reading them in order will enhance overall enjoyment by enriching the plot development.