For those of you who like your pulp with an occult twist- Amazon UK have Dennis Wheatley's The Devil Rides Out on Kindle for 99p today(Sunday 8th December). This was possibly the best of his black magic novels and fighting for the side of good is the Duc De Richlieu along with his stereotypical pulp sidekicks Rex, Simon and Richard. It was made into a Hammer film back in the 60s with Christopher Lee playing the Duc. Can thoroughly recommend this worth every penny of the 99 and more.
Incidentally Amazon have nearly all of Dennis Wheatley's Black magic, Duc De Richlieu and Gregory Sallust novels on Kindle at around the 3 to 4 pound mark. Unfortunately they don't have the Roger Brooke Napoleonic series on Kindle yet, hope they will release those sometime in the near future.