Floodgates - Emma Shelford - Bog

Not even magic can hide me from the voices in my head.
I''m now a spy in the nefarious organization Potestas. They search desperately for unimaginable powers, and their charismatic leader has welcomed me into the fold. But I''m being watched by suspicious members and mysterious bodiless voices alike.
When King Arthur''s lost grail is discovered, Potestas wants to retrieve the ancient relic from the ocean''s depths. But it''s stuck to the seafloor by magical means, and I''m the only one who can stop Potestas from triggering a tsunami of epic proportions. The trouble is, I don''t know if the voices in my head will let me.
I am Merlin-out of my depth.