A captivating, often hilarious novel of family, loss, wilderness, and the curse of a violent America, Dave Eggers’s Heroes of the Frontier is a powerful examination of our contemporary life and a rousing story of adventure.    Josie and her children’s father have split up, she’s been sued by a former patient and lost her dental practice, and she’s grieving the death of a young man senselessly killed. When her ex asks to take the children to meet his new fiancée’s family, Josi