noun
novella
nuh-VEL-uh/nəˈvelə/
A work of prose fiction longer than a short story but shorter than a novel.
This novella tells a complete story in just ninety pages.

Etymology
The diminutive of Latin “new” lies behind the sense “news” or “new story,” which became “short story” in Italian. English uses novella for the middle-length form between a short story and a novel.
In context
if that's basically what fluff is and it might work in like a novella or short story form after you've already written a really beloved series
More examples
- We read the entire novella in one evening.
- Her novella follows two sisters through a difficult summer.
- The collection includes three novellas and several short stories.
Forms
novella · novellas · novelle
Similar words
- novelette
- Usually suggests a shorter work, though the length categories overlap.
- short novel
- Emphasizes the work's novel-like form rather than a separate category.