Erin Hunter
All of the "Warriors" novels are listed as being written by Erin Hunter. Erin Hunter is a pen name for four people, Victoria Holmes, who creates the storylines and edits, Kate Cary, Cherith Baldry, and Tui Sutherland, who write the books in turns. Chronologically, "Firestar's Quest" takes place between the first two series—after the events of "The Darkest Hour" and before "Midnight". "Firestar's Quest" was put under the title "Warriors: Super Edition", as a special edition extra long book.