Simplify the following text for a Grade 8 native English-speaking person.
Original: Kate Cary ( born November 4 , 1967 in England ) is one of the authors of the Warriors novel series , a story about wild cats , which she writes under the pen name of Erin Hunter .
Simplified: Kate Cary ( born 4 November 1967 in England ) is one of the authors who write the Warriors book series using the name Erin Hunter .