The Outsider Covers

I am (trying) to complete work for the House of Illustration and Folio Competition, this year the chosen book is The Outsider by Albert Camus.
In order to get an idea of how the story has been visually represented before I gathered images  covers from different editions.
They all have a slightly eerie atmosphere and definitely highlight the  characters emotionless and solitary existence. Another important factor seen in these covers is the colour choice. Within the story the sun and heat symbolises the society and culture that the main character, Meursault, finds tiresome and difficult to bear. He is uncomfortable in the sun just like when he is surrounded by members of his community.
The covers that have only a few elements I find the most successful, they convey the 'outsider' much more effectively than that of a detailed cover.