A Clockwork Orange is supposedly loyal to it's source material, the American edition of the novel.
> This plot discrepancy occurred because Kubrick based his screenplay upon the novel's American edition, its final chapter deleted on insistence of the American publisher.
> This plot discrepancy occurred because Kubrick based his screenplay upon the novel's American edition, its final chapter deleted on insistence of the American publisher.
https://en.wikipedia.org/wiki/A_Clockwork_Orange_(film)#Diff...