The Queen of the Dawn by S.M. Gaither — book slip

Casia Greythorne, now the ruler of the Kethran Empire, faces her greatest challenge yet: sealing away the darkest god threatening her world.

To succeed, she must venture into a perilous new realm, confront old enemies, and unravel ancient magic. As chaos spreads and alliances falter, Casia and her allies must navigate a world on the brink of destruction.

With the dawn approaching, will they survive to see a new day?