Won Jin moved without hurry.

That was the first thing I noticed about him. He disappeared into his bedroom and returned carrying a box smaller than a shoebox, wrapped in celadon green cloth — the colour no other nation could replicate. He set it on the low wooden table between us, smoothed the cloth once with both hands, and began to untie it.

Nobody spoke.

*

That morning had begun three hours earlier, before dawn, in a van that was not built for mountain roads.

There were six of us in the van — all with serious stakes in the world of print. Woo Sik Yoo was there as the man at the centre of it all. I was there as a filmmaker — specifically, the one who had spent years making a documentary about Jikji, the world’s oldest extant movable metal book. It is one of the stranger things about documentary filmmaking: months and years of research have a way of turning you into something resembling an expert, whether you planned it or not.

And now I was rattling up into the mountains of southern Korea, the chassis shuddering over loose stones. I gripped the handle above the window and tried not to look at the drop on my left. The mist was still thick, clinging to the mountain like something reluctant to let go.

Woo Sik Yoo is not a bibliographer. He is a semiconductor engineer — co-founder and CTO of a Silicon Valley diagnostics company, trained in electrical engineering at Kyoto University. He spent his career analysing the forensic signatures that manufacturing processes leave on silicon wafers. Seven years earlier, he had turned that same methodology on an 800-year-old Korean Buddhist text called The Song of Enlightenment. Scholars had classified it as a woodblock print, produced in 1239. Woo Sik looked at the same images and saw something different.

He saw movable metal type.

If he was right, The Song of Enlightenment was the oldest extant book printed with movable metal type — 138 years older than Jikji, the Korean text UNESCO already recognised as a landmark of human civilisation. More than two centuries older than the Gutenberg Bible.

If he was right, the history of printing needed to be rewritten. Again.

The temple appeared in a break in the dense forest, sitting above green terraced fields that dropped away in long careful steps into the valley below. I remember thinking how strange it was to be here — that we had travelled this far up a Korean mountain in the early morning, chasing a question that many scholars had already decided wasn’t worth asking.

But that’s the thing about Woo Sik. He asks it anyway.

Won Jin was waiting for us. He served tea first. We sat around a table made from a single trunk of wood, as he poured green Korean tea into small white pottery cups — hand-thrown, slightly uneven, the kind made without handles so you feel the heat through the ceramic. That’s the point. You’re meant to.

Won Jin is a natural host. He asked each of us about the conference we had just come from, how our presentations had gone, what the arguments were. Around the table, among the print scholars, sat Kang — a Pulitzer Prize-winning photographer, there to document whatever was about to happen.

Outside, it had begun to rain.

Then the Buddhist Broadcasting System crew arrived, cameras and equipment shouldered, and filed in out of the rain. Won Jin simply made room for them. Lunch appeared in the next room — a low table, the kind you sit around on the floor. The dishes were an odd and charming mix: Korean celadon alongside British porcelain, Port Meirion’s Botanical Garden pattern, impossibly familiar in this setting. Bean paste soup, earthy and slow, flecked with chilli, unlike anything I had eaten before — grown and gathered, I assumed, from those terraces we had driven past on the way up.

The rain continued outside. Not hard, not soft. A kind of background melody.

The television crew set up their equipment and ate alongside us. Won Jin focused his attention  between guests, unhurried. I remember thinking he seemed unbothered by the significance of what was about to happen. Or perhaps that stillness was its own kind of significance.

Then he went to his bedroom.

I looked at Woo Sik across the table. His face was unreadable. Seven years of research. Peer-reviewed papers. A technology he had built himself, specifically to answer this one question. And opposition — pointed, institutional, personal — from the scholars whose life’s work depended on a different answer.

Won Jin returned with a celadon cloth-wrapped box and set it on the table. His hands untied the wrapping slowly. He placed them on the lid. Looked around at each of us.

He said nothing.

He opened it.

Inside, wrapped in further cloth, was the book. The Song of Enlightenment. The cover was grey and matted, worn in the way that only centuries produce. Won Jin opened it, and I watched Woo Sik’s eyes move across the page — slow, trained, certain.

He looked up. He nodded once.

I didn’t need him to say anything. I already knew.

—

*This is the first in a series of posts about the search for the world’s oldest book. The investigation continues.*