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In comics, an ongoing series is a series that runs indefinitely. This is in contrast to limited series (a series intended to end after a certain number of issues thus limited), a one shot (a comic book which is not a part of an ongoing series), a graphic novel, or a trade paperback. However, a series of graphic novels may be considered ongoing as well. The term may also informally refer to a current or incomplete limited series with a predetermined number of issues.
An ongoing series is traditionally published on a fixed schedule, typically monthly or bimonthly but many factors can cause an issue to be published late. In the past, the schedule was often maintained with the use of fill-in issues (usually by a different creative team, sometimes hurting quality), but increasingly the practice has been to simply delay publication.
An ongoing "might run for decades and hundreds of issues or be canceled after only a handful of issues". When an ongoing series ceases to be published because the story has ended, it may be called "finished". If it ceases to be published because of low sales, editorial decisions, publisher bankruptcy, or other reasons, it is "cancelled". An ending might be written for the last issues of a cancelled series, or the series may simply disappear without warning and never return.
If a series ceases to be published, but may be published again, it is called "on hiatus". Many series are placed "on hiatus" but do not return even after several years.
For series that are creator owned, the copyright holder has the option of approaching other publishers to see if they would be open to resuming the title under their imprint. For instance, Usagi Yojimbo has had four consecutive publishers.
DC Comics President and Publisher Paul Levitz accepted an award on behalf of DC from the Guinness World Records, recognizing Detective Comics as the longest-running comic book periodical in the United States of America.
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