Simplify the following text for a Grade 9 native English-speaking person.
Original: When Hedwig is killed in the seventh book , the author said she expected the strong emotional reaction of her readers : `` The loss of Hedwig represented a loss of innocence and security .
Simplified: Hedwig is killed in the seventh book , about which Rowling says : `` The loss of Hedwig represented a loss of innocence and security .