Transmigrate into a Book with a Mutant Dog in the Apocalypse

Wen Youbai wakes up to find she has transmigrated into a book, and not just any book, but an apocalypse novel where she's the villainous supporting female character?

Wen Youbai is dumbfounded. With the male and female leads and zombies to contend with, how can she stay alive a little longer?