Decoding the Harley Book: A Journey Through Ancient Texts, Prophecies, and Mysterious Worlds
The Harley Book has long been a relic of great importance to the scholars of Ohara, particularly to Nico Robin, whose lifelong pursuit of understanding the lost history of the world has driven her to explore every fragment of ancient knowledge. Recently, the legendary archaeologist, alongside Saul, discovered a crucial piece of information from this sacred book—texts that not only confirm suspicions about the mysterious and mythological nature of the ancient world but also point toward a new, unfolding chapter of the Will of D. This article will delve into the Harley Book and the mural it reveals, decoding its deep mysteries and offering a glimpse of the past and future conflicts that could reshape the world.
Table of Contents
ToggleThe Significance of the Harley Book
The Harley Book is an ancient and incredibly rare Sacred book that Saul gave to Nico Robin in Elbaph, containing knowledge from an age long forgotten. According to Saul, this sacred book holds the sacred writings of a long-lost civilization, with each chapter detailing different “worlds.” The book’s true origin and the reason why it was preserved for so long remain unclear, but it is deeply connected to the Sun God Nika and the ancient wars that shaped the fate of the world.
The Harley Book consists of three chapters, each representing a different world. The third chapter is particularly important as it appears to detail events yet to come, suggesting that the book not only chronicles history but also acts as a prophetic text.

Nico Robin, having studied poneglyphs and ancient texts for years, immediately saw the value of this sacred book. Upon hearing Saul’s description of the book’s content, she eagerly took the book to decode its messages. The translation of the mural in the final pages of the third chapter would be key in unraveling the truth about the world’s past, present, and future.
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The Mural: A Glimpse Into the Ancient World

The Mural painting, which Franky and Ripley saw there at the Treasure Tree Adam Tour.
And the Sacred book which Saul gave to Robin, is the the Harley Book. It’s a complex and intricate illustration that divides the ancient world into two major halves, one that predates humanity’s current existence and one that might be the world they live in now. The Treasure Tree Adam sits at the center of the mural, dividing the image into two parts. On one side, there’s a great battle, while on the other, a serpent of hell flame brings devastation.
The Central Figure: The Treasure Tree Adam
In the center of the mural, we see the Treasure Tree Adam, an important symbol in the One Piece world. This tree is known for its significance in creating the great ships of the world, notably Pluton and other ancient artifacts. Its central position in the mural implies that the tree is a crucial anchor for understanding the forces that shaped the ancient world. This artifact may also play a role in the future of the One Piece world, especially with regard to Luffy’s journey.

The Right Side of the Mural: The Great City and the Ark

On the right side of the mural, we see two major events. First, a great city is under attack by a massive serpent. This may be a metaphorical representation of an ancient war or conflict, perhaps the same destructive forces that once roamed the Void Century. We also see an ark containing a king, angels, and various animals, suggesting a catastrophic event—possibly an apocalyptic scenario—that led to a great exodus or mass migration of people.
The depiction of the moon and people offering stars further suggests that this could be a reference to events that happened on the moon, paralleling the murals found in Skypiea that Enel discovered, suggesting that the moon has always held significant meaning in the ancient world’s beliefs.
The Left Side of the Mural: Nika’s Battle and the Alliance of Races

The left side of the mural is perhaps the most fascinating, as it shows a fierce battle between Nika, or perhaps Joy Boy, and a winged demon wielding the Sun in its hands. The Sun God, as described in the sacred text, is a divine yet destructive force that plays a central role in the world’s creation and destruction. Nika, in this depiction, is not alone—he fights alongside a diverse group of warriors, including giants, samurai, lunarians, minks, and even a mermaid princess accompanied by sea creatures.
Perhaps the most intriguing figure in this part of the mural is a robot resembling Emeth, an ancient and enigmatic mechanical being. The inclusion of these beings, along with ships from various cultures, suggests that this battle is not just a local conflict but a war involving multiple races and civilizations.
The alliance between Nika and these various factions paints a picture of unity across races—an idea that could have far-reaching implications for Luffy’s journey. This coalition of beings, fighting against a winged demon, could have been a historical event that shaped the course of the Void Century, and it may be telling us something about the future of the ancient world war.
Decoding the Sacred Texts of the Harley Book
The Harley Book contains a series of cryptic messages, each representing a different “world.” Let’s break down the texts and their meaning.
The First World: The Flame of Destruction

The first chapter of the Harley Book speaks of flame, representing the destructive nature of the ancient world. Mankind, driven by unchecked desire, touched upon the forbidden Sun and enraged the deity of Earth. The appearance of the Sun God only brought further chaos, leading to the rise of the serpent of hell flame, which ravaged the world with death and darkness. The text warns that these forces can never be met again, implying that the first world was destroyed by these uncontrollable powers.
This seems to align with the story of the ancient war that ravaged the world and led to the downfall of many civilizations. The Sun God in this context could be symbolic of the uncontrollable power that existed in the world at the time—perhaps an all-powerful entity or force that brought the world to its knees.
The Second World: Seeds of War

In the second chapter, the world enters a period of emptiness and breath—a world in which the deity of Forest sends demons to cause havoc. This is a period of transition, where the Sun spreads seeds of war. The inhabitants of the half Moon and the Moon share a dream of some kind, suggesting a collective vision that unites them.
Men become gods after slaying the Sun, while the deity of the Sea goes on a rampage, hinting at the emergence of powerful forces that rise in the wake of the destruction. The warning here, similar to the first world, is that these powers cannot be met again.
The imagery of the demons, the half Moon, and the dreamlike nature of this world suggests that the second world was one of chaos and conflict. Perhaps this world mirrors the state of the Void Century, when powerful factions vied for control, and the World Government began to rise in power.
The Third World: A World on the Brink

The third chapter speaks of a world in chaos and void, where the promised day is awaited. This prophecy is both hopeful and ominous, as the Sun God laughs and dances, leading the world to its end. The Sun God is described as the harbinger of a new morning, but it is unclear whether this is a literal new beginning or the end of all things.
The shadow remembers, and the world listens to the fragmented Moon, suggesting that the remnants of the past will guide the future. This is where the Sun God will return, bringing about a significant change. But who or what will cause this change remains a mystery.
King’s Revenge and the Future of the War

One intriguing possibility that emerges from the Harley Book and its depictions is the potential for King, one of Kaido’s closest subordinates, to join forces with Luffy in the upcoming war. King, a member of the lunarians and a survivor of a world that was almost destroyed by the forces represented in the mural, might see the current conflict as an opportunity for revenge.
King’s desire for revenge could fuel his involvement in the war against the World Government, particularly if he believes that the events of the Void Century will repeat themselves. His own history and the ancient war depicted in the Harley Book might align with Luffy’s cause, especially considering the presence of lunarians and giants in the mural.
Conclusion: The Coming War and the Future of the World
The Harley Book offers us a rare glimpse into the ancient history of the world and its prophetic future. The murals and texts, decoded by Robin, suggest a world fraught with ancient wars, divine forces, and the struggle between creation and destruction. As we look ahead, the potential for an epic world war seems inevitable, and the Will of D will continue to shape the course of history.
With the Sun God returning and alliances forming across races, the coming war might not just be a battle for the One Piece but a final reckoning for the world’s future. Luffy, King, and the diverse factions that make up the world’s fractured history might one day unite to face a common enemy and secure a new world order.
The stage is set, and the story of the Harley Book is far from over. As Robin and Saul continue to unlock its secrets, the truth about the Void Century, the Will of D, and the legacy of the Sun God may reveal a destiny that no one, not even the gods themselves, can control.
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