The Thing on the Doorstep

Howard Phillips "H. P." Lovecraft (August 20, 1890 – March 15, 1937) was an American author who achieved posthumous fame through his influential works of horror fiction. Virtually unknown and only published in pulp magazines before he died in poverty, he is now widely seen as one of the most significant 20th century authors in his genre.
Excerpt-It is true that I have sent six bullets through the head of my best friend, and yet I hope to show by this statement that I am not his murderer. At first I shall be called a madman - madder than the man I shot in his cell at the Arkham Sanitarium. Later some of my readers will weigh each statement, correlate it with the known facts, and ask themselves how I could have believed otherwise than I did after facing the evidence of that horror - that thing on the doorstep.