The Dragon's Eye: An Epic Progression Fantasy - Yokai Calling, #2

Lacotl's sinister game is in full swing. The White Warlock wants his Dragon Eye back. Both lead to the library where long-forgotten demons dwell... but no knowledge comes for free. Warlocks and their draconic bloodlines once controlled the sun and stars. Beneath the banner of the Dragon Goddess, they conquered Yumihari with the help of the Dragon Eyes. Dragon Eyes have been missing since the fall of the Warlock Empire.
Until Hidekazu and Masanori found one in the hands of Lacotl, the dark sorcerer responsible for kidnapping noblewomen from Tsukiko and plunging Seiryuu into his dark game. Princess Aihi and the twins refuse to abide by his plots. But when Lacotl plays his hand and tragedy strikes the palace, the trio has no choice but to pursue the secrets of the Dragon Eyes. In their quest to unlock the artifact's power, the demons they face will test their friendship. Push their abilities to the limit. The White Warlock pursues them, hunting after his stolen Eye.
They aren't the thieves who took it. But they are the ones who will be punished. Jump into the world of Yumihari, a land filled with spirits, dragons, monsters, and stunning characters wielding elemental magic to save their homeland. If you love epic fight scenes, mystery and political intrigue, mythology, monsters, mayhem, and progression fantasy, you will love The Dragon's Eye and the Yokai Calling series.