Eclipse of the Mortal Realm: Crone of White Flame Book 1 by C. J. Saint

The Veil has kept the realms separated since the beginning of time - until now.

When a spirit attacks Tharion, the truths the Kingdom has long tried to hide are finally exposed: the Veil is cracking, letting ancient evil into the realm of the living. The Fates have destined Tharion to save the realm – yet also to lose.

If he doesn’t stop the Veil’s collapse, a demon sorcerer will claw his way out, threatening to blanket the realm in darkness.

With the help of Eleanora, a brilliant but underestimated witch, and her familiar, Rowan, Tharion sets out to mend the Veil’s fractures before it’s too late.

But every step towards the end reveals new lies and old betrayals. The closer they get to the final breach, the more Tharion realizes that saving the realm will demand a sacrifice he isn’t ready to make.