What story does atticus read to scout at the end of book?

At the end of Harper Lee's "To Kill a Mockingbird," Atticus reads "The Gray Ghost" to Scout. This is a series of short stories by "The Rover Boys" by Arthur M. Winfield.

It's important to note that while Scout enjoys the story, it's not a particularly significant plot point in the novel. The scene serves to highlight the innocence of childhood in contrast to the harsh realities Scout has encountered.