Lethal White

It seems to me that the background story and the writing techniqgue get worse along the series. The first book was written really week, you can almost taste the talent of J.K. at every page. Here, however, there is almost only dialogues and not any more beautiful description. Also, chapter and sentences get really shorter. Someone could say that this is the way to write a detectivme story, but actually the thing that I found interesting about this series was how JK could write a detective story, not how she could manage with stereotypes.
Furthermore, the author is unable to address one of the main problems of detective stories: how not to introduce too many characters and situations that entangles the situations so that it becomes impossible to follow the story and try to guess who is guilty and why.
In summary, it seems to me that this series has lost any original characteristic that was cool.