Crooked Staircase, Dean Koontz

It’s been three weeks since Jane Hawk, former FBI agent started pursuing the group she knows as the Arcardians. Her five year old son, Travis is hidden away and she is on the tail of a major player with government ties. As Jane is laying her plans to capture and interrogate him, the Arcadians strike back; sending two of their most effective hunters after Travis. Jane becomes aware that he's in danger but is she too late to save him?