Simplify the following text for a Grade 7 native English-speaking person.
Original: In addition to books that she wrote , such as the Eaglesmount series , she works with Kate Cary , Tui Sutherland , and Victoria Holmes under the pen name of Erin Hunter , writing the Warriors and Seekers series .
Simplified: Baldry collaborates with Kate Cary , Tui T. Sutherland and Victoria Holmes under the pen name of Erin Hunter .