Joe Morelli is a fictional character from the popular book series written by Janet Evanovich. He is a detective in the Trenton, New Jersey police department and is known for his charm, good looks, and complex relationship with the series' protagonist, Stephanie Plum. Morelli often finds himself involved in various investigations and adventures alongside Plum. In the series, Morelli is portrayed as a skilled investigator with a strong sense of justice. His character adds depth to the storyline, as he balances his professional duties with his personal life, particularly his romantic tension with Plum. This dynamic contributes to the series' appeal and humor.