What is Multi-author series?
A multi-author series is a set of related books that share a setting, theme, or continuing storyline but are written by different authors. It lets readers explore one world or premise through many voices and perspectives.
In publishing, a multi-author series (sometimes called a shared-world or shared-universe series) is a coordinated collection of novels or novellas linked by a common setting, cast of supporting characters, events, or overarching plot. Each entry is usually written by a different author working to an agreed brief or series “bible” that defines key facts—timeline, place names, recurring characters, tone, and any continuity rules—so the books hang together as a cohesive experience. Entries can be fully standalone (read in any order) or numbered so readers can follow a specific sequence.
Usage example
The publisher launched a seaside multi-author series in which each book follows a different couple living in the same coastal town; readers can enjoy any standalone romance but get extra satisfaction from spotting recurring characters and references across volumes.
Practical application
For readers: multi-author series deliver variety—different writing styles, subgenres, and perspectives within one familiar world—while keeping the pleasure of recurring settings and cameos. For creators and publishers: they accelerate release schedules, broaden marketing reach through cross-promotion, and attract fans of particular authors into the shared universe. For an interactive platform like Endless Romance, multi-author series can expand a world quickly with diverse narrative approaches and seasonal or event-driven releases while maintaining continuity through editorial coordination.