Here's a list of books on Traditional Witchcraft and magic. I'm sure there are dozens of others, so feel free to add your suggestions in the comments!
~Practical Reading~
•Traditional Witchcraft: A Cornish Book of Ways
- Gemma Gary
•A Deed Without A Name: Unearthing the Legacy of Traditional Witchcraft
- Lee Morgan
•Treading the Mill: Practical Craft Working in Modern Traditional Witchcraft
- Nigel G. Pearson
•Call of the Horned Piper
- Nigel Aldcroft Jackson
•The Way of the Shaman
- Michael Harner (Traditional Witchcraft has quite a few shamanistic attributes, making this worth the read)
•Mastering Witchcraft: A Practical Guide for Witches, Warlocks and Covens
- Paul Husson (it’s more Wicca based, but it’s a classic with some very strong points)
•Village Witch
- Cassandra Latham-Jones
•Devon Witchcraft and Folk Ways
- Sarah Hewett
•Secrets of East Anglian Magic
- Nigel Pennick
•A Grimoire for Modern Cunning Folk: A Practical Guide to Witchcraft on the Crooked Path
- Peter Paddon
•Crone’s Book of Charms and Spells/Crone’s Book of Magical Words*
- Valerie Worth
•The Black Toad: West Country Witchcraft and Magic*
- Gemma Gary
*= These are really just spell books with not much else in them. They’re good, but not if you want to understand deeper the spiritual side of Traditional Witchcraft.
~Historical Reading~
•Cunning Folk and Familiar Spirits
- Emma Wilby
•Popular Magic: Cunning-folk in English History
- Owen Davies
•Witchcraft in Early North America
- Alison Games
•The Archaeology of Ritual and Magic
- Ralph Merrifield
•The Power of Words: Studies on Charms and Charming in Europe
- James A. Kapalo, Eva Pocs and William Francis Ryan
•The Tradition of Household Spirits: Ancestral Lore and Practices
- Claude Lecouteux
•Between the Living and the Dead
- Eva Pocs
•Ecstasies: Deciphering the Witches’ Sabbath
- Carlo Ginzburg and Raymond Rosenthal
•The Night Battles: Witchcraft & Agrarian Cults in the Sixteenth & Seventeenth Centuries
- Carlo Ginzburg, John Tedeschi and Anne Tedeschi
•Witches, Werewolves, and Fairies: Shapeshifters and Astral Doubles in the Middle Ages
- Claude Lecouteux
