In the 1990s, he wrote books about historical paganism, folklore and Contemporary Paganism in Britain; "The Pagan Religions of the Ancient British Isles" (1991), "The Rise and Fall of Merry England" (1994), "The Stations of the Sun" (1996) and "The Triumph of the Moon" (1999), the latter of which would come to be praised as a seminal text in the discipline of Pagan studies. In the following decade, he wrote on other topics: a book about Siberian shamanism in the western imagination, "Shamans" (2001), a collection of essays on folklore and Paganism, "Witches, Druids and King Arthur" (2003) and then two books on the role of the Druids in the British imagination, "The Druids" (2007) and "Blood and Mistletoe" (2009).