I've never read Garth Nix, even if i read a lot of books in my life, but I'll have a look at it!
Lord of The Rings is also my favourite book, but I loved Spin by R.C. Wilson, or Robots by Asimov. +Les Trois Mousquetaires, by alexandre Dumas (french book, very famous!!^^)
The Inheritance Cycle by Christopher Paolini The Bartimaeus Trilogy by Jonathan Stroud Enchantress From The Stars by Silvia Engdahl The Last Apprentice by Joseph Delaney
Ooh Dunadan, you so have to try Garth Nix - especially his Abhorsen series. If you like fantasy stories, this one will be interesting for you. It's totally different - about necromancy (but it's more than that).