Crownbound by Ink

When Princess Elnora cracks open a dust-covered grimoire in the forbidden wing of the palace library, the ink spills like smoke-and a war-crowned stranger steps out of the page. King Caelan of Ashmere was bound to the book by an old curse and an older betrayal. Now he's tethered to Elnora by living script that curls across their skin, pulling them closer every time they try to pull away.
He wants his kingdom back. She wants her freedom from a court that treats her like an ornament. The book wants...something else. To break the curse, they must complete a series of "chapters" that test them both-sworn oaths, dangerous tasks, and rituals that demand shared breath, shared power, and dangerously intimate trust.
Elnora and Caelan are enemies on paper-she's the princess raised to fear his name; he's the king who would gladly topple her father's throne. But forced proximity, a single bed in a sanctuary carved from stacks of spellbooks, and magic that flares hottest when they touch turns sharp banter into slow-burn obsession. As plots coil through the palace and the grimoire writes new rules in midnight ink, desire becomes the most treacherous chapter of all.
If they finish the book, Caelan may vanish back to his war-torn realm...and take Elnora's heart with him. If they fail, the ink will claim more than their crowns.
Tropes & vibes: enemies-to-lovers, forced proximity, touch-triggered magic, reluctant allies, banter & knives, scarred king × clever princess, found-in-the-library, "we shouldn't but we do."
Heat level: High-on-page intimacy between consenting adults, plenty of tension, and scenes that turn the page red.