That splendid website The Spooky Isles is currently carrying an interview with the humble author, conducted by MJ Steel Collins. Amidst the waffling, poltergeists, vampires, dinosaurs and the Maggie
Wall Witchcraft Monument all get a look-in, as do H.P. Lovecraft, Aleister Crowley and the late great John Peel.
Have a gander here: http://www.spookyisles.com/2013/07/geoff-holder-paranormal-author-interview/