It is a filename extension naming convention. The idea was made popular by the CDisplay sequential image viewer since then, many viewers for different platforms have been created.Ĭomic book archive is not a distinct file format. Application/vnd.comicbook+zip, application/vnd.comicbook-rar Ī comic book archive or comic book reader file (also called sequential image file) is a type of archive file for the purpose of sequential viewing of images, commonly for comic books.