http://www.hplovecraft.com
He certainly established his own writing style.
https://en.wikipedia.org/wiki/H._P._Lovecraft#Themes
HP Lovecraft: Fear of the Unknown
https://www.youtube.com/watch?v=Spoz_1KyZiA
https://en.wikipedia.org/wiki/Cthulhu_Mythos-
https://www.youtube.com/watch?v=Ob7PfxvJCN0
http://www.goodreads.com/author/show/9494.H_P_Lovecraft