Cross et triangle is a French-language graphic novel or bande dessinée authored by Kai Shaku and published by Soleil Productions in May 2003. Presented in a mass market paperback format spanning 172 pages, the work falls within the youth-oriented comics genre, as indicated by its classification as 'BD Jeunesse' in retail listings. The title suggests thematic elements involving symbolic or geometric motifs—'cross' and 'triangle'—which may reflect narrative or visual symbolism central to the story. As a product of the early 2000s Franco-Belgian comics tradition, it aligns with Soleil Productions’ catalog of illustrated works targeting younger readers. No detailed plot summary is available from the provided metadata or search results, but the consistent attribution to Kai Shaku and the specific ISBN identifiers confirm its identity as a distinct, standalone publication.