xxxHolic (×××ホリック, Horikku?, in-universe officially typeset xxxHoLic), pronounced "holic", but often pronounced phonetically "ex-ex-ex-holic" or "triple x holic", is a seinen manga series planned and presented by Clamp. The storyline of xxxHolic crosses over with that of a number of other CLAMP series, the most notable of which are Tsubasa: Reservoir Chronicle which was written in tandem with it, and Cardcaptor Sakura, whose history it draws on at several points.
xxxHolic has been serialized in Kodansha's Young Magazine periodically since 2003 and published in volumes under the KC Deluxe label. It is currently published in the United States by Del Rey Manga and in the United Kingdom by Tanoshimi. The art style of the manga draws on the influence of ukiyo-e wood prints.