On September 26, 2006, Kadokawa Shoten published Clamp Newtype Platinum, a special Clamp edition of Newtype Magazine. The issue includes the "X 18.5" supplement, a re-print of five previously uncollected chapters. The series was originally expected to reach twenty-one volumes upon completion.
![X [エックス] book cover 1](https://images-na.ssl-images-amazon.com/images/S/compressed.photo.goodreads.com/books/1540634089i/42450765.jpg)
![X [エックス] book cover 2](https://images-na.ssl-images-amazon.com/images/S/compressed.photo.goodreads.com/books/1540634612i/42452825.jpg)
![X [エックス] book cover 3](https://images-na.ssl-images-amazon.com/images/S/compressed.photo.goodreads.com/books/1540636094i/42452959.jpg)
