Hp Lovecraft : The hidden Cult

For my American and english friends:
The famous horror and supernatural writer HP.Lovecraft, after his death, inspired many magical cults based on his works and many hoax books like as Necronomicon.
But ,if the real facts wasn't this?
IF He meet  a real  Cult  during  his life and  his writer path?
Hp Lovecraft: The  Hidden Cult.
In Italy  published  and I hope in English !!