The One Ring: Realms of the Three Kings

In Eregion long ago many Elven-rings were made, magic rings as you call them, and they were, of course, of various kinds: some more potent and some less. The lesser rings were only essays in the craft before it was full-grown, and to the Elven-smiths they were but trifles yet still to my mind dangerous for mortals. But the Great Rings, the Rings of Power, they were perilous.

In the twilight of the Third Age, three realms of the West-elves still endure in Middle-earth. By the power of the Three Rings, they exist as a testament to a time that was. But not only the Elves remember. As Sauron gathers his strength to bring war to Middle-earth once again, he plans a devious vengeance against those who humbled him long ago.
Realms of the Three Rings is a supplement for The One Ring, the official tabletop roleplaying game based on the works of J.R.R. Tolkien.

Chapter 1: Where The West-elves Still Linger describes the realms of Lrien, Rivendell and Lindon and those who dwell there, including the Elf-lords who are their guardians.
Chapter 2: The Days Darken provides the Loremaster with details about Saurons schemes against the Immortal Folk, including possible events, Adversaries, and Loremaster characters.
Chapter 3: Landmarks outlines twelve sites of interest, including locations mentioned in The Lord of the Rings and others created specifically for the game.
The Appendix contains rules to play High Elves of Rivendell and Elves of Lrien, and introduces guidelines to create Elf-lords, powerful characters especially suited for solo play.