Good Harbor (Hardcover) by Anita Diamant

From their first meeting, a friendship grows between two women who have each reached a crossroad in her life--fifty-nine-year-old Kathleen, whose sister had died of breast cancer and who has recently been diagnosed herself, and the slightly younger Joyce, increasingly distant from her teenage daughter, assessing her marriage and family, and struggling to write a second novel. 200,000 first printing.