CLAMP no Kiseki (CLAMPノキセキ, CLAMP's track or CLAMP's miracle) is a twelve volume series of anime books celebrating the 15th anniversary of Clamp in 2004. It is published in America by Tokyopop and in Spain by Norma Editorial. Each volume is a full-color, 32-page book that contains summaries of featured series, interviews with Clamp and friends of Clamp, artwork, and exclusive new short comics. In addition, each issue comes with three special chess pieces featuring characters from Clamp's various series.