By REGINA M. ANGELI
Wendy Corsi Staub continues her tale of the serial killer dubbed the "Nightwatcher" in her second chilling installment, "Sleepwalker." (Harper Books/403 pages)
A decade has passed since attacks on September 11th. Allison has married the widower, Mack, and the couple and their three children have moved outside the City of New York.
While in prison, the man who had confessed to being the Nightwatcher commits suicide. Yet the horror is not over for Allison and Mack.
Plagued with guilt over his first wife's death on September 11th, Mack develops severe insomnia and is prescribed a sleeping medication which causes a peculiar side effect - sleepwalking.
On one terrifying night, Allison spies him walking about with a knife.
When murders similar to those committed by the Nightwatcher killer begin in her quiet suburb, Allison fears that the police caught the wrong man and the fiend is still on the loose in her Westchester neighborhood.
The nightmare is not over as Staub continues this trilogy of terror in her next thriller, scheduled for publication in February, 2013, "Shadowkiller."