This is the true story of Karen the orangutan's brave journey through history-making heart surgery and how she won the hearts of everyone around her at the San Diego Zoo. As a young orangutan, Karen had a life-threatening heart murmur caused by a hole in her heart. To save Karen's life, a surgery team from UC San Diego Medical Center performed open-heart surgery on her--the first time this had ever been done on an orangutan. Readers will...