"In 1973, MGM released a curious film called Wicked, Wicked. Shot entirely in what the movie posters touted as “Duo-Vision” (better known as split-screen), it followed, in simultaneous halves, a string of brutal murders at a swanky California hotel. Loud, jazzy, and splashed with blood, it was an American take on the giallo slasher films popularized by Italian directors like Dario Argento and Mario Bava. But unlike cult classics like Suspiria or Kill, Baby . . . Kill!, Wicked, Wicked quickly faded away.
Still, one has to wonder if debut author Wohlsdorf, staying up too late as a child, managed to catch it, and it made an impact. If so, her trauma is our gain: Security, her debut, is a flawless literary refresh of giallo devices, completed with a masked-and-gloved killer; long, sharp knives; screaming; lingerie-clad victims; and twists aplenty—oh, get ready for the twists..."