The series is about Jane Hawk, a rogue FBI agent who is in search of her husband's killer(s) and the reason for it. Her husband's death was said to be a suicide but Jane knows that it isn't true. The series is among New York Times bestselling author Dean Koontz's notable works. The Night Window, released in 2019, is the fifth and the final book in the series.

The series is about Jane Hawk, a rogue FBI agent who is in search of her husband's killer(s) and the reason for it. Her husband's death was said to be a suicide but Jane knows that it isn't true. The series is among New York Times bestselling author Dean Koontz's notable works. The Night Window, released in 2019, is the fifth and the final book in the series.