Just perusing the bookshelves the other day, looking for new books/xmas ideas for DS (10). He's read all the Percy Jackson/ Artemis Fowl/Alex Rider books, and a couple of Charlie Higsons Young Bond and the Jimmy Coates books, so that's his preferred style. Anyway, I saw the Gone series and the Maze Runner and various others by the same author and the Malorie Blackman books. Are these a bit too grown-up? Would you say they're suitable for a 10year old? He's an avid reader, but obv it's the content that could be the issue. TIA.