The Gods Below: Book One of the Hollow Covenant

After a divine war shattered the world, humanity struck a pact with the god Kluehnn: in return for regular tribute of magical gems, Kluehnn would restore the world to its former glory. But as each land is transformed, so too are its people changed into strange new forms, if they survive at all. Hakara is not willing to pay such a price. Desperate to protect herself, and her sister Rasha, she flees her homeland for the safety of a neighbouring kingdom. But tragedy strikes when they're separated, and Hakara is forced to abandon Rasha to an unknown fate. Yet when Hakara discovers she can channel the power of the magical gems, she's invited to join a clandestine plot to destroy the God Pact. To win Hakara to their cause, the conspirators reveal a startling secret: Rasha is alive and they can help rescue her. But only if Hakara goes to war against a god.