Why Didn't They Ask Evans?

While playing an erratic round of golf, Bobby Jones slices his ball over the edge of a cliff. His ball is lost, but on the rocks below he finds the crumpled body of a dying man. The man opens his eyes and with his last breath says, "Why didn't they ask Evans?"

Haunted by those words, Bobby and his vivacious companion, Frankie, set out to solve a mystery that will bring them into mortal danger. . .

This title was previously published as The Boomerang Clue.