1 . Starship Troopers by Robert Heineken . It is not like the movie . I recommend it because I think it is a good work regarding citizenship . 2 . Dr . Sleep by Stephen KingGiven the age of your audience , I think it is a good book about damage to one ' s self and recovery . You are only as sick as your secrets . read and see 3 . Caught by Harlen CobenIt is a good story showing the two sides of forgiveness and the effects the choice to forgive or not can have on lives . 4 . On Basilisk Station by David WeberThis is the first of a series and I like it for your audience because it is entertaining and the protagonist a woman shows respect and great honor in the face or hardship and how to wear command in good times and bad times and what making hard decisions in leadership calls for and costs . The theme of doing what is right regardless the personal cost runs deep in this book . That should keep them busy and give them somthing to tug at their brains for years to come .