Both in J. R. R. Tolkien's The Hobbit novel and in Peter Jackson's trilogy of film adaptations, Thorin II Oakenshield was obsessed with the treasure of Erebor, particularly the Arkenstone.

The pair of them and Samwise Gamgee were the writers of the Red Book of Westmarch, which is the in-world book that recounts the Quest of Erebor and the Quest of the Ring. As expansive and fruitful ...