I'm looking for more information on the Fey as presented in Running Wild (under Strange Spirits). The bit about them perhaps being some strange mix of physical and astral, pulling together bodies from disparate materials when they manifest, etc, has intrigued me. I've dug through Tir Na Nog and Tir Tarngire, any other sources of potential information?

London
Imago
Shadows of Europe
Shadows of Asia
Paranormal Animals of Europe
Tir na nÓg

In case you know German, a few bits of moderate canon can be found in:
Walzer, Punks und Schwarzes Eis
Chrom & Dioxin