The Calculus Affair is the eighteenth volume of The Adventures of Tintin, the comics series by the Belgian cartoonist Hergé. It was serialised weekly in Belgium's Tintin magazine from December 1954 to February 1956 before being published in a single volume by Casterman in 1956.The Adventures of TintinThis book shows wear, it has a cut on the front page, you can tell there was a child that looked at, and read it often. Some ware on corners of some pages. Color still vibrant, still intact all pages there. OLD COMIC BOOK!