When Jake Steinman discovers an ancient bookmark in his antiquarian bookshop, he uncovers more than just a curious artifact—he finds a doorway into fiction itself. The parchment relic allows him to physically enter the worlds of literature, walking alongside characters and experiencing stories from within. But as Jake explores this impossible ability, he realizes the boundary between fiction and reality is more permeable than anyone suspected.

When mysterious entities begin manifesting in his small town of Daybridge, Jake must confront the consequences of his literary travels. With the help of folklore scholar Rebecca Chen, he races to understand the bookmark's true nature before the threshold between worlds collapses completely. As fiction bleeds into reality with increasingly dangerous effects, Jake discovers that stories may be alive in ways few have ever imagined—and some tales will do anything to escape their pages. "The Threshold Between Pages" blends bibliophile fantasy with cosmic horror in a thrilling exploration of narrative, reality, and the spaces in between.