Unlike with permanent navigation GPS units, you can simply unplug a portable GPS and move it from car to car. In contrast to a smartphone navigation app, you don't have to be in an area with cell service in order to get turn-by-turn directions from a navigation GPS.
Dracula Untold is a movie that will show a historical remaking on the origins of vampires. Though Bram Stoker wrote Dracula in 1897, his character was likely based on a historical man from the fifteenth century, the Prince of Wallachia, Vlad Tepes the Impaler.
The first known writer of this idea to be really well known by English speakers was Bram Stoker, with his novel DRACULA, loosely based on the life of Vlad the impaler. But there was another not as well known story, called 'Barney the Vampire' corney but true, which was written before Dracula. I think this was based on the true story of a Russian man who went around attacking women and drinking their menstrual blood (sick yes).