All That Glitters Isn't Gold. The Olympus Chronicles, #1

In the aftermath of the Titan War, Zeus rules Olympus as the unquestioned King of the Gods, yet beneath the peace lies an unsettling truth. The Olympians have secured victory, but they have not discovered the deeper purpose of their power. When Hermes uncovers an ancient chamber hidden beneath Mount Olympus, he, Zeus, Athena, Apollo, and the other gods begin a journey that reaches far beyond the familiar stories of Greek mythology. Within forgotten halls older than Olympus itself, the gods encounter a mysterious guardian entrusted with protecting the First Promise, an ancient covenant established before the reign of the Olympians.
As they explore increasingly hidden realms, they discover that their understanding of creation is incomplete. Their search leads them to the Archive of Voices, where forgotten lives, overlooked acts of courage, and the memories of ordinary people are preserved alongside those of kings and heroes. Among these stories, the tale of Lyron, a forgotten child whose quiet compassion changed countless lives, teaches the immortals that history is shaped as much by kindness as by conquest.