The Lord of the Rings Online Book 14 Interview

Turbine's Jeffrey Steefel took the time to address questions about Book 14, Mines of Moria, and other future content updates for The Lord of the Rings Online over at MMORPG.com.
Book 14's story will start to set players up to travel through the mines. They will hear that the Fellowship of the Ring has been through the mines and have stirred up all kinds of unknown evil. It will be up to the players to clean up Frodo and Co.'s mess in the upcoming expansion.

While Steefel tells me that you could call Moria Book 15 in the continuing story that is Lord of the Rings Online, Turbine is actually looking at it another way. (You could call it Book 15, but it's really Book 1 of Volume 2,) he said. (Every year when we have an expansion, it's going to be a new volume.)

(The whole story of the Witch-King and Angmar trying to take over Eriador as the free people stop them from doing that, that's kind of volume 1, books 1-14. Then, we start volume 2 in Moria, then it becomes more about the start of the war that's going on on the other side of the Misty Mountains. The evil now starts to be more centered on Sauron and Sarumon and less about the Witch King.)