More conservative estimates included Helen Berger and Craig Hawkins in "Exploring the World of Wicca", who guessed from 150,000 to 200,000. Melton, J. Gordon, Jerome Clark and Aidan A. Kelly in "New Age Almanac" (1991, p. 340) estimated a total of about 300,000 people associated with the "overall movement" of Wicca, with "tens of thousands" of members active in between 1,000 and 5,000 covens. Conservative estimates in 1993 arrived at about 50,000 Wiccans in the US ("Religious Requirements & Practices of Certain Selected Groups: A Handbook for Chaplains", 1993) while Wiccan high estimates claimed several million (Phyllis Curott, "The Book of Shadows: A Modern Woman's Journey into the Wisdom of Witchcraft and the Magic of the Goddess"). In 2008, U.S. Today estimated 1 million Wiccans, a fast growth compared to the 100.000/200.000 estimated in late 1990s and early 2000s.