Greatest writer and free thinker, Christopher Hitchens:
Hm. Hyperbole always bothers me; the use of the word 'greatest' is one I am most miserly with, as I am not sure it should be bestowed so readily.
Anyway, to my mind, Christopher Hitchens is always well wrote reading. Generally, he writes exceptionally well, and is always thought-provoking and interesting and challenging - indeed, he makes you challenge your own adhesion to your own assumptions if only to refute him. Moreover, he touches on material and ideas that many mainstream thinks wouldn't touch with a barge pole. However, each to their own, but I'd dispute the use of the word 'greatest'.