Another great site is
www.solasdana.org. It's the website of Frank MacKowan, the author of
The Mist Filled Path. I can't recommend this book enough. Also good is Tom Cowan's
Fire in the Head. This is a must read. For one of the greatest books on Celtic folklore read
Fairy Faith in Celtic Countries. It tells how Pagan beliefs were transformed by country folk and how the old Gods never were forgotten. A must read.