Natalie.mu has posted pics of the cover of Kyary's new book “Kyary Bon” as well as a couple of pictures from inside the book. Preorder links for it are posted on the previous page of this thread. According to the description on Amazon JP, it's supposed to be 112 pages long. Based on the pictures posted on natalie.mu, it looks like it's going to be a photobook. The description indicates that it's a style book with information about herself, her family, and friends but I used google translate to translate the page so that may not be 100% accurate:
Cover
Some photos from the book: