The following is an abbreviated list of books I have enjoyed. They all have something to do with the occult, the mysteries, or spirituality. Each of the authors appears to have some level of insight, though sometimes it is tenuous as best.
I will add to this list as time permits.
Book of Shadows. Curott, Phyllis; Broadway Books, 1999
Witchcrafting. Curott, Phyllis; Broadway Books, 2001
The Outlander Series: Outlander; Dragonfly in Amber; Voyager; Drums of Autumn, The Fiery Cross. Gabaldon, Diana; Dell, 2001
Lord John and the Private Matter. Gabaldon, Diana; Delacorte Press, 2003
Camulod Chronicles, seven book series. Whyte, Jack; Penguin Group
The Avalon Series: Mists of Avalon; Forest House; Lady of Avalon; Priestess of Avalon. Marion Zimmerman Bradley; various publishers