Of Swords and Spells. Wardens of Estralia, #5

Vivienne Valeran returned to Erthea thinking she'd made the right choice. She gave up the man she loves, severed a bond that was never meant to break, and chose duty over desire. But home offers no peace-only  fading wards, and a world that no longer feels like hers. As void breaches open along Erthea's shores, Vivi is dragged back into the fight she tried to leave behind. Ancient magic is failing.
The veil between worlds is thinning. And someone is tearing down the barriers on purpose. Across the veil, Diego faces a war of his own. Atheria is splintering, his brother has disappeared, and the bond he thought broken still tugs him toward Vivi-when he can least afford it. Every breach he seals costs him more of his power. More of himself. Separated by worlds but still connected, Vivi and Diego are running out of time.
Old secrets are rising. The past is catching up. And if the wards fall, no world will survive what comes next.