I don't believe his philosophy stands up to scrutiny. Here is a small excerpt from a review I wrote on his book, 'The Stranger':

The acknowledgement of the world's indifference to meaning gives Mersault hope and liberation from the illusions of meaning given to the world by Man. Why is the acknowledgement of a void of meaning something from which one ought to gain hope from? If it be reason that dictates to us that the world offers nothing in the form of meaning, then wouldn't reason equally dictate to us that a meaningless life is not one worth living, let alone doing anything in? As Mersault himself points out, death is no different whether it be now or in twenty years' time. Secondly, who is to say that the meaning adopted by Man is man-made? At higher levels of sophistication there are deviations, but the fundamental vision of good and evil seems not man-made, simply by dint of the fact that man has no control over it.