vampire-suggestion:

Books:
Dracula, of course. If you dig the epistolary format, I suggest you check The Historian. I am not the biggest fan of the “Stoker’s Dracula is Vlad III” theory/Florescu’s stuff, but the book is still beautiful and the characters are nice and good and very human. Then the “alternate international versions” of Dracula, like Powers of Darkness or Dracula in Istanbul. 
Let the right one in. This one feels sad, dark and oppressive. I really loved it.
After 90 years. It’s a short novella, but you all should read it if you are into folkloric vampires over modern ones.
Movies:
Shadow of the Vampire, Byzantium… there’s also a load of good versions of Dracula to choose from. Then there’s Van Helsing, which is my guilty pleasure.