This site is now longer maintained, I’ve moved to https://aiwendil.net/ . I hope to see you there! 🙂
Here you’ll find links to the various campaign overviews, covering all GW supplements.

The Lord of the Rings (DeAgostini; 2002-2006) 
The Hobbit (2012-2016) 
Shadow & Flame (2003) 
Siege of Gondor (2003) 
The Battle of Pelennor Fields (2004) 
The Scouring of the Shire (2005) 
A Shadow in the East (2005) 
Fall of the Necromancer (2006) 
The Ruin of Arnor (2007) 
Khazad-Dûm (2007) 
Gondor in Flames (2007) 
Harad (2008) 
Mordor (2008) 
Gondor at War (2019) 
Scouring of the Shire (2019) 
War in Rohan (2019)