Codemasters has released the first part of the Book 14 to Mines of Moria patch. This Mines of Moria update is for current players with The Lord of the Rings Online Book 14 already installed. Visit this website for detailes. The US version of this patch is also available (thanks: Jorge).

The Lord of the Rings Online: Mines of Moria EU Standalone Patch #1 (2.87GB)

The Lord of the Rings Online: Mines of Moria EU Standalone Patch #2 (465.63MB)

The Lord of the Rings Online: Mines of Moria US Standalone Patch (2.68GB)