About the Book Touya and the rest of the team make their way to Eashen to find some mysterious ancient ruins...but get caught up in an Edo period-style battle to save Yaes father and brother! While Touya impresses onlookers with more unique magic and creative uses of his smartphone, the group is guided toward their true reason for visiting Eashen. What new challenges await them at the ruins? The summoning of the Black Monarch, an underwater temple...and the sky garden Babylon!?-- Book Synopsis In search of ancient ruins, Touya and his party have traveled to the far east, all the way to the country of Eashen! There, mysterious rumors are circulating about a competition thats about to start, and Touya just might find himself getting involved...