This cache commemorates the fourth book, published in 2007, in the series; Chronicles of Ancient Darkness by Michelle Paver. The book takes place 6000 years ago during the New Stone Age, and tells the story of Torak, Renn and Wolf.
“The dreadful secret that Torak carries with him is revealed and he is cast out from the clans. He’s alone, cut off even from Wolf and Renn. Hunted and on the run he takes refuge in unknown territory, the haunted reed beds of Lake Axehead, where he is menaced by the Hidden People. Other threats lurk nearby and his battle with the Soul-Eaters is far from over… As he fights for his life, Torak uncovers a deception too awful to contemplate, one that shakes him to the core and shatters his world.”
The cache is a 375mL Sistema container. It has also been placed in the same habitat that the book was written to take place; by a lake with an island in the middle.