The Fear Place — Phyllis Reynolds Naylor

For Doug's brother, Gordie, the ridge with its spectacular view is a magical, special place, but for Doug, it's The Fear Place. Two years ago, Doug hiked to the ridge during his family's annual camping trip, and he vowed never again to cross the narrow ledge from which the earth dropped away six hundred feet to the canyon below.
But now the boys' parents have been called from their vacation by a family emergency, and Doug and Gordie are alone in the wilderness. After one of their seemingly endless fights, Gordie has stomped away from their campsite. When Girdle doesn't return, Doug fears the worst, particularly when he hears reports that a cougar has been sighted nearby. Doug knows he has to go after his brother, and he knows where he will find him. What he can't imagine is the surprising source of the courage to overcome his fears.