On the Night Plain — J. Robert Lennon

At the end of World War II, Grant Person abandons his family's ranch on the Great Plains for a fishing boat on the Atlantic, only to be drawn back by his mother's death. His father has mysteriously disappeared, and Grant's brother, Max, a lifelong rival, takes off on the day Grant returns, leaving him with a sickly flock and a pile of debt. When Max returns a year later with a young woman named Sophia, a contest of will begins between the brothers, reviving ghosts that Grant had hoped were banished from the homestead.