˚₊‧⁺⋆♱˚₊‧⁺⋆A/N: I haven't bought the book yet, but there are some free pages at the link. It seems so well written, i will add some pages down bellow!
https://books.google.gr/books?id=o3h_DwAAQBAJ&lpg=PA91&dq=slenderman%20real&lr&hl=el&pg=PA91#v=onepage&q=slenderman%20real&f=false