For nearly a year now I have had an internet stalker that has been obsessed with me on...

For nearly a year now I have had an internet stalker that has been obsessed with me on a very severe level. They have made numerous accounts to message me* they draw pictures of me almost every day* they have written erotic fan fiction about me* they have threatened to come to where I live* they even spent the last * months writing an entire book of short stories where I'm the main character (they literally self-published it and everything). This person has now started messaging some of my Facebook friends asking them to send me things. There is nothing else I can do to keep this person from stalking me and making new accounts. I have them blocked on Twitter, DiviantArt, Skype, and Facebook, and they have now resorted to contacting my friends. What do I do? This person lives in a different country from me, so I am unable to get the police involved.