The Call (C) 2017 Bill Myers, The Haunted (C) 2017 Frank Peretti, The Sentinels (C)2017 Angela Hunt, The Gril (C) 2017 Alton GanskyThe Invitation compiles the first four episodes of Harbingers, each following a different character. Four strangers with gifts they don't understand soon realise pockets of darkness are emerging throughout the world. Whether it involves a mysterious house, the unexplainable death of animals around the world, or an otherworldly little girl, each puzzle they solve brings them closer to the ultimate explanation of what's happening. But will they discover the truth in time?