Posthaste Manor is a collaborative horror novella, co-written by Jolie Toomajan and Carson Winter, published by Tenebrous Press. At this point, you might be not surprised that this is a quite weird novella, blending elements from cosmic and gothic horror, with an innovative narrative style; and that goes from really tense moments to even get a laugh from you.

Everybody has a story with Posthaste Manor, a house with a name and a long history of darkness; and effectively, we will soon understand that the characters are just pieces used to create an aura over the real main character: the Manor, in a really cosmic way. 
We have a book divided into two sections, with different natures; a first one following at the same time the personal stories of two people, bouncing between timelines in each chapter, creating the horrific atmosphere around the Manor, and a second one telling us the different stories people have lived in relationship with the Manor (and let me tell you, with wildly varying styles).

While the style is really weird, due to the unique nature of this novella, it shows how a collaborative work can bring so much creativity into the table; it's simply mind-blowing (but be aware of reading the content warnings before diving into it, because it gets really dark).
It's true that this structure might not click for everybody, but in my particular case, I felt it increased the impact it caused over me; the two complementary stories in the first half establish the house's figure, preparing you for the absolute madness that is unleashed in the second one.

Posthaste Manor is, simply, a marvelous horror novella, a delightful experience if you are looking for a different kind of horror. Well done, Joolie Tomajan and Carson Winter!