"Sukkwan Island" is an excellent book that has largely won the Prix Medicis abroad 2010; "Wastes" that followed, built on the same frame is disappointing; too close to the previous one, it manages either to hold in breath or to surprise the reader. "Impure" is once again stage a pathological family: there's grandmother -Rich includes-on - who loses his head and is, as such, in a retirement home. The eldest daughter (?) Suzy-Q lives alone with her son Galen, perfect missed 22 who constantly pushes his departure for the university and who prefers listening to New Age music and masturbating while reading a porn magazine. The fact that he does not know who his father must add to his discomfort is believed guess. The second daughter, Helen, quite successful in the genre slut is only interested in money from her mother that she deals with pretty horrible way. She lives with her daughter Jennifer, little tease 16 who will deflower her cousin during a stay in a mountain cabin. Galen's mother who saw the scene, then threatened to denounce her son and have him thrown in jail. As expected for a number of page, things will go wrong at the same time that the novel loses the little interest he had so far! I stood up to page 171 and I finished flying over the 100 remaining pages from where the rest of the family has completely disappeared, giving way to a called mother-son confrontation. It is vain, hollow, ever seen or ever read and vaguely pornographic passages strictly add nothing, quite the contrary. The only interest, for me, this book is for making me discover the New Age Music Kitaro which I knew nothing. In short, it will be understood, "Unclean" is a perfectly dispensable novel!