The Threshold is a horror novel which is set in the early 90s. Tormented, angry spirits are gathered at the threshold waiting to cross into the world of the physical, but they need the assistance of the living to do so. Dave Chatburn, now an adult, is tormented by the death of his brother 20 years earlier. Suddenly he begins to have dreams in which that death, which he feels he could have stopped, are vividly replayed. This is the work of the spirits softening his mind for their use. Dave teams up with a local medium and both are manipulated into conducting the ceremonies which they believe will seal the rift and keep the spirits at bay. Sandra McElroy is a true medium who also experiences dreams, only she sees the true meaning and makes a trek from St. Louis to find the source and stop the impending disaster.