The Four Treasures Saga [Isekai / LitRPG]

"The Four Treasures Saga" is an Isekai/LitRPG series. Book One, "Children of the Cold Moon," follows Bren, who is transported to the Celtic Otherworld on the winter solstice. Discovering an imminent global threat, he utilizes ancient magic and guidance from Celtic mythological figures on a quest for relics that can restore balance. Bren's journey becomes a personal one as he uncovers his own identity and confronts his past, ultimately finding the hero within. Book Two, "The Breaking of Annwn," sees Bren, now aware of his origins, attempting to unite the fractured forces of the Otherworld against the Overking. Meanwhile, his allies, the fairy Fíadan, his Fomorian brother Cai, and the conflicted noble Tadg, forge their own paths toward a common fate. Their journeys across Annwn expose them to mythical creatures, ancient deities, and perilous magic. As alliances shift and old powers awaken, new enemies emerge and old friends reappear. The escalating conflict will determine not only a kingdom's destiny but the very landscape of their world.