Clockwork Orange - Target audience

The book cover I've chosen for the Penguin Book cover brief is A Clockwork Orange. The book was first published in 1962, from this you can suggest that the current target market who reads and watches the film are of a older demographic of between 40-50. However due to the nature of the book the target audience would be a lot younger as just because the book was first published a long time ago, there is no indication within the book that it's for an older generation. 

Therefore, the target market I'll be designing for is ages between 18-40. The book is graphic in some scenes, so it wouldn't be appropriate for people under 18 and audiences over 40 are more likely to not find the book as interesting as it once was and their views and opinions may of changed and became more conservative which is the opposite of the books content. As the target audience aged range is quite big it may become important for me to design a cover that the younger and older generations can appreciate and feel as if they have been thought off.