John Matthews has produced a number of successful divinatory systems based on early spiritual beliefs—including the best selling Arthurian Tarot (with Caitlin Matthews and Miranda Gray), The Wildwood Tarot (with Mark Ryan and Will Worthington), The Green Man Tree Oracle (with Will Worthington), The Celtic Animal Oracle and Grail Tarot (with Giovanni Casselli). His book, Pirates, was No 1 in the New York Times Book Review and a best seller for 22 weeks in 2007.
Wil Kinghan is a writer, artist and explorer of the Hermetic and Celtic traditions. He studied Archeology at University College Dublin, and Environmental Design at NCAD in the 1980s. He then worked in advertising and commercial art as an Art Director, winning awards for various campaigns such as for Guinness in the 1990s. He left advertising to form his own company and develop his art and writing. He recently completed work on several writing and illustration projects including The Shaman's Oracle (Watkins) and The Ancestor Oracle (Watkins).