Reading widely and across different subjects is essential.
Here are few examples of great authors to read:
Mythology: Joseph Campbell,
Witchcraft: Stewart Farrar, Phyllis Currott, Timothy Roderick, Gemma Gary
Psychology: Clarissa Pinkola Estés,
Shamanism: Michael Harner
Archetypes: Genet Paris, James Hillman
Magick: Kenneth Grant, Lon Milo DuQuette
Alchemy: Franz Bardon
Paganism: Ronald Hutton
Pagan Cosmology: Glenys Livingstone
Sacred Ceremony: Jane Meredith
A few specific books:
”Practising the Witch’s Craft: real magic under a southern sky.” Edited by Professor Doug Ezzy. Multiple authors including Tim Ozpagan.
”Dancing the Sacred Wheel: A Journey through the Southern Sabbats” and “Call of the God: An Anthology Exploring the Divine Masculine within Modern Paganism”. Editor and author Francis Billinghurst.
“Journey to the Dark Goddess: How to return to your soul” by Jane Meredith.
“PaGaian Cosomology: Re-inventing Earth-based Goddess religion” by Glenys Livingstone
Wiccan Wisdom 