Books:
The 21 Lessons of Merlyn by Douglas Monroe
The Lost Books of Merlyn by Douglas Monroe
The branch of Druidism featured in the above two books seems to combine Gnosticism with Celtic Shamanism. I've been working the system contained within them for several years. This section of the website contains the rituals I've worked with, complete with any revisions I've made to them.
Pheryllt: A Modern Guide to the First Systemetizers of the Ancient Celts & the Pre-Druidic Religion
The Gnostic Bible: The Pistis Sophia Unveiled by Samael Aun Weor
The Essential Crystal Handbook by Simon and Sue Lilly
Websites:
http://www.newforestcentre.info/
This is the website for New Forest Centre. Highly recommended.
http://www.evertype.com/misc/charm.html
http://www.fortunecity.com/bally/wicklow/283/ogham.htm
http://www.whats-your-sign.com/tree-symbolism.html
https://www.lightforcenetwork.com/logos-overseer/three-circles-existence-druidic-view-reincarnation
http://herbalriot.tumblr.com/post/53669603055/the-magickal-uses-of-belladonna-caution
http://www.pagansworld.org/2011/03/hump-day-herbs-datura/
https://www.angelfire.com/wizard2/awen/
Online Tools:
Google Translator: Latin to English