Good HarborGiven the breadth of Anita Diamant's bestselling biblical epic, The Red Tent, it seems natural that her second novel has a much closer focus. Set in the small Massachusetts fishing town of Gloucester, Good Harbor is a slow paced study of female friendship. Here Diamant can luxuriate in the development of just two principal 59 year old Kathleen Levine, a children's librarian who is undergoing radiation therapy for breast cancer, and a 42 year old