A novella is a written, fictional and prose narrative, usually longer than a novelette but shorter than a novel. The English word "novella" derives from the Italian word "novella", feminine of "novello", which means "new".
The Science Fiction and Fantasy Writers of America Nebula Awards for science fiction define the novella as having a word count between 17,500 and 40,000. Other definitions start as low as 10,000 words and run as high as 70,000 words.
The novella is a common literary genre in several European languages.