Shattered Landing. Tales of Haroon, #3

Sylvie has been the soul seeker for a small village on an island in the Great Sea for all of her life. She makes sure that all of the fishermen make it back home regardless of storms or accidents. When a stranger arrives in a boat propelled by magic, her life is upended. Ludwyn demands that she join him on a mission to find the perpetrator of forbidden magic. He wants to use her ability to locate an extremely dangerous wizard.
Despite her reluctance to leave her village, she's intrigued. Along the way, they meet up with more Dwyners and soldiers, people who she considers to have more appropriate skills for this perilous endeavor. Incursions of bloodthirsty monsters from a different plane delay their quest. The barriers between worlds are thinning. Somehow, they must prevail to protect the people of Haroon from a flood of lethal creatures, but the hardships she faces are almost enough to break her.