If you are thinking about reading W, you probably need some incentives to pick up a copy, apart from star ratings (and, be warned, after reading W, you way have unpleasant reactions to ratings in general in the future).
So here are some incentives: try to imagine writing a memoir of your childhood between the ages of three and nine, set in the period from 1939 to 1945. Imagine that you have only a few photos and that your own fairly vivid memories don't always match the accounts of relatives or the evidence of the photos. Imagine that you can write beautifully and with an amazing insight into the workings of a child's mind. Now you have an idea of the treats in store in the Souvenir d'Enfance or Memoir part of this book.
Next, imagine that the child who experienced such a childhood later created an incredibly detailed and complex fictional world based on the brutal rules of the survival of the fittest in order to explain to himself the inhuman logic behind the notion of concentration camps.
Now you know that W is an oblique and startling commentary on the holocaust. You have read nothing like this ever. The cool, objective, logical, tone of the writing in W draws you in. You will feel compelled to keep turning the pages until you reach the end.