The Nova Scotia author behind the 2020 book, “Hench,” a novel about undervalued henchman working for supervillains, is back with a sequel. “Villain” continues the story of Anna, who takes down corrupt corporate superheroes with the power of data analysis and spreadsheets. “I was always hopeful for a sequel,” says author Natalie Zina Walschots. She says “Hench” is self-contained and has a distinct ending but leaves the door open for more.