Ten thousand years ago, a boy walked a thousand kilometres to see where the earth ended.

His name was Jack. He was born in a village of forty huts, at the edge of the world. He counted horizons, asked too many questions, and could never stay still.

When he left, he planted a road behind him — a tree for every day — so that no one who came after would ever be lost.

He did not write a book. He grew a forest.

Now, ten thousand years later, glaciologist Helen Marlowe finds something impossible frozen in the ice: a memory that should not exist. A silver tree that should not exist. And a road of forty-one trees stretching across an entire continent, each one exactly a day's walk apart.

With Muhammad Ali, Samuel Ward, and Kenji, Helen follows the trees — through blizzards, fire mountains, lakes full of birds, singing dunes, and a valley of green fire — to uncover the story of the boy who walked to the end of the world, the girl who dreamed his name, and the last seed that waited ten thousand years on a stopped heart.

JACK THE FROZEN MEMORIES is an epic tale of love, loss, memory, and what we leave behind. A story about the marks we make — in stone, in books, in forests — and the people who follow them, even ten thousand years late.