Before revision: Petra appeared in the novels Bartleby "; " Left Behind Series; Appointment with Death; The Eagle in the Sand; The Red Sea Sharks, the nineteenth book in The Adventures of Tintin series; and in Kingsbury's The Moon Goddess and the Son.
After revision: Petra appeared in the novels Bartleby ; Left Behind Series; Appointment with Death; The Eagle in the Sand; The Red Sea Sharks, the nineteenth book in The Adventures of Tintin series; and in Kingsbury's The Moon Goddess and the Son.