Anyone who has tasted redemption should read this book. Anyone who needs redemption should read this book. Yet, as a warning, this book is heavy. Only by great heaviness can thene be a true need for redemption.
I do not know whether Alan Paton believes in the gospel, but his priest characters certainly do. Their gospel brings forgiveness for real sins through Jesus Christ's death alone. Through them, the worldview is phenomenal.
I recommend Cry, the Beloved Country to advanced readers, however. Intermediate readers may not be ready for the sin portrayed (e.g. a woman in poverty turns to prostitution); also, they may need to be led through the political and social justice issues. Beyond that, everyone should read this story of redemption.