Blind Date with a Banned Book - Dystopian Fiction 1954

Dystopian fiction published in 1954, recommended reading age 12 and up, reasons for challenges: brutal violence and vulgarity, Goodreads ranking 3.7 stars, blurb: a group of schoolboys survive a plane crash and are stranded on a deserted island. They descend into savagery, exploring the dark side of humanity.