A non-rotational multi-author series (or simply a coauthored series), while older than the concept of a rotational multi-author series, is significantly rarer nowadays since the advent of Project Klinkerpoop. It is a series where multiple authors post comics in no set rotation and may or may not follow a set storyline. Several varieties of this exist. The first non-rotational multi-author series was Psycho Dogs and Carbonated Beverages.