Ender's Game

Once again, Earth is under attack. An alien species is poised for a final assault. The survival of humanity depends on a military genius who can defeat the aliens. But who? Ender Wiggin. Brilliant. Ruthless. Cunning. A tactical and strategic master. And a child. Recruited for military training by the world government, Ender's childhood ends the moment he enters his new home: Battle School. Among the elite recruits Ender proves himself to be a genius among geniuses. He excels in simulated war games. But is the pressure and loneliness taking its toll on Ender? Simulations are one thing. How will Ender perform in real combat conditions? After all, Battle School is just a game. Isn't it?

Violence: Critics cite the book's lethal child-on-child violence and depictions of war as reasons for a ban, arguing that the material is too intense for young readers.
Offensive language: Complaints have included the use of "swear words" and other offensive language in the text.
Pornographic references: Some parents have described certain scenes as "pornographic," though the author and others dispute this, noting the scenes contain no sexual content.
Religious and political opposition: The book's author, Orson Scott Card, is a Mormon who has publicly opposed same-sex marriage. Some see the efforts to ban his books as stemming from this position rather than the content itself.
Challenging themes: The book explores complex themes like the value of life, moral and immoral actions, and the consequences of war, which some find disturbing or not suitable for children.
Specific incidents: For example, a 2012 incident in South Carolina involved a parent filing a police complaint after a teacher read excerpts to students, though no criminal charges were filed against the teacher.