Strange forces are moving through the trees . . . with murderous results. Can a haunted FBI agent stop them before they release an unstoppable entity that could destroy everyone and everything? R.C. Hayes has settled into his job with the FBI, and put behind him the strange incident that ended his military career. But when he and his partner are sent to the Flathead Indian Reservation in Montana to look into a murder, events take an unsettling and eerily familiar turn. R.C. struggles to solve the case as deaths pile up around him and as the situation takes a decidedly unnatural cast. With the help of a mysterious new ally, he may finally come to terms with what happened to him long ago-and enter a strange new career he is uniquely suited for. Provided he can survive the incursion of supernatural elements into his supposedly safe and mundane world! This is the second full-length novel in the O.C.L.T. series, about a group selected to shield the world from situations that defy logical explanation, using diplomacy, guile, force, and strategy as necessary. It joins the novellas "Brought to Light" and "The Temple of Camazotz" and the novel The Parting, each of which can be enjoyed separately but also introduces another facet of the O.C.L.T. team. Incursion draws the loose ends together and sets the stage for further adventures.