Secrets of Avalon by Krystal Shannan

A Fae prince cursed to go mad if he doesn’t recover a missing shard of his soul. A human woman running for her life… who doesn’t know she holds the shard. Their worlds are broken, and they must find each other across dimensions if Earth and Avalon are to survive. Small problem: while an evil queen and her minions are trying to hook them up, everyone else wants them dead…

Dive into a fantasy world that blends mythlogy and magick in a fresh new way! Now serving, slow burn to spicy romance.
Hawke Stormblood is heir to the Fae throne on Avalon. His father is stepping down after a 2000-year reign, and Hawke will have to choose a wife, have a child, and lead his people for the next two millennia…except he’s going feral. And if anyone finds out, he’ll be executed.
On Earth, Melinda Mayweather’s mother is burned at the stake by anti-magick fanatics who will do the same to Melinda if they find out she shares her mother’s forbidden gift. Running for her life, those who would use her magick for evil and those who would kill her for it close in on her. With nowhere safe to hide, Melinda takes up her mother’s quixotic search for a way off Earth—a fabled door that leads to the land of Avalon where magick isn’t illegal.

Melinda’s beloved stepfather sacrifices his life to help her open the way to Avalon. But instead of finding safety in this strange new world, her magick is dangerous and volatile and feared here, as well. She meets Hawke and is wildly attracted to him, but she’s terrified of loving him and determined not to let him fall in love with her. Everyone who loves her dies. Tragically.
His sanity slipping, Hawke fights to convince Melinda they’re fated to be together and to let down her emotional walls. But as urgently as he needs the shard of his soul back if he’s to fulfill his destiny, he refuses to force her to do or feel anything.

Love him. Kill him.
Lose her. Go mad.

Together they embark on a harrowing journey that will change the course of their lives, turn Avalon upside down, and trigger a war between realms that will destroy worlds or save them all. And just maybe Melinda and Hawke’s epic love really will conquer distance, time, and death itself…