The Dionaea House by Eric Heisserer

"The Dionaea House" it's a piece of "creepypasta" that originally gained popularity online in the mid-2000s, before the term "creepypasta" was even common. The story it's presented as a series of documents, including emails, blog posts, and text messages.

It all begins when Mark Condry receives a newspaper clipping about a mutual friend, Drew, who committed a double-murder suicide. Mark, along with his friend Eric, begins investigating the events that led to Drew's death. Their investigation leads them to a mysterious, seemingly normal-looking house that appears to be at the center of a series of bizarre and terrifying incidents.

Original story format on way back machine

Audio version read by M. S. Stover (YT)