"More and more often these days I get asked what books would I recommend for solitary witches who have gone beyond material aimed at beginners. The truth is, there aren't that many. The Deep Heart of Witchcraft, by David Salisbury, is one I've recommended in the past. Now I'll be adding Traditional Witchcraft and the Path to the Mysteries by Mélusine Draco.
This book is the final in Mélusine's series Traditional Witchcraft for Urban Living, Traditional Witchcraft for the Seashore, Traditional Witchcraft for Fields and Hedgerows,Traditional Witchcraft for the Woods and Forests and Traditional Witchcraft and the Pagan Revival.It is aimed at witches who have worked through all the earlier books, taken on board the lessons and have a thorough grasp of the techniques and practices of witchcraft. So, one might ask, what is there left to learn? "
Taken from http://www.badwitch.co.uk/2015/03/review-traditional-witchcraft-and-path.html this is part of a much longer review of Path to the Mysteries, written by 'bad witch' Lucya Starza.
I've tagged the other books in the series, which Lucya refers to in her review, and also David Salisbury's excellent 'Deep heart of witchcraft'.