Verge of Darkness by Ollie Odebunmi

They thought the soul eaters were a myth from a time long-lost in antiquity. They were wrong. After holding for a thousand years, the barrier between worlds is breached, now demons stalk the land leaving horrific death and desolation in their wake. The only hope lies with a tavern owner ill-suited to bear the responsibility, and three warriors of rare skill. As the final battle looms, the four must face their deepest fears in a cataclysmic struggle to stop the land from plunging into a new age of darkness.