A female Maiasaura finds a lost egg in the forest and decides to look after it with her own egg. Surprisingly, a baby tyrannosaurus hatches from the egg! The greathearted mother accepts and raises him as her own son, Heart. One day, Heart goes to pick berries and comes across another tyrannosaurus. Heart then makes a tough decision and leaves his family behind to discover who he really is. The fourth title in this series, "I Will Love You Forever" delivers a heartwarming story about adoption with vivid illustrations and endearlingly drawn characters.--Publisher.