The Four Treasures Saga [Isekai / LitRPG] Novel

Bren is thrust into the Celtic Otherworld on the winter solstice, where he discovers an existential threat endangering both worlds. Wielding ancient magic and accompanied by legendary figures from Celtic mythology, he embarks on a dangerous quest to recover powerful relics that could restore balance. As he unravels the mysteries of his true identity and confronts his past, Bren learns his mission extends beyond saving the Otherworld—he must also find the hero within himself. Having learned the truth about his origins, Bren works desperately to unite the fragmented forces of the Celtic Otherworld against the Overking. He's joined by his fierce fairy ally Fíadan, his Fomorian brother Cai, and the conflicted noble Tadg, each following their own path toward a common fate. Together they traverse the wild reaches of Annwn, encountering strange fae, forgotten deities, and perilous magic. New alliances emerge, ancient powers awaken, and the stakes escalate. The coming battle will determine not only the kingdom's survival but transform the land itself.