The Spirit Door. The Witches of Hollomere, #4

She crossed the veil of death for him. Now they must fight their way back together. Seraphina Locke thought she had won. After months of unraveling a century-old curse, she had given her love, the ghost of Hollowmere, three perfect days of being truly, tangibly alive. Three days of warmth and laughter and a future finally within reach. Then he was torn away. Pulled into the chaos of the Spirit Realm by a force older and darker than any Mortmain curse, Nathaniel is lost somewhere in the howling void between life and death.
His soul, once shattered across a hundred years of torment, is now scattered across a plane Seraphina was warned never to enter. But warning has never stopped a Locke witch. Armed with the Soul-Key, the power of her ancestral home, and a love that defies the natural order, Sera steps through the spirit door. What waits on the other side is a realm designed to unravel identity itself - a sea of a million stolen memories, ancient predators that feed on coherence, and the fractured pieces of the man she refuses to leave behind.
Finding him is only half the battle. Getting home will require a sacrifice no spell book can prepare her for. The Spirit Door is a gothic, emotionally devastating conclusion to the Witches of Hollowmere series - a story of impossible love, fierce magic, and the terrifying beauty of choosing someone over paradise.