I don't get agitated by much, but this term bothers me. For decades, there have been established story lengths, and not one of them is called a mini book, or even mini story. These are the established word counts...

Flash fiction: 6 > 800–1000 words

Short story: 800–1000 > 8,000–10,000 words

Novelette: 8,000–10,000 > 20,000 words

Novella: 20,000 > 45,000 words

Novel: 45,000 > 90,000 words

Super Novel: 90,000–110,000 words

Epic Novel: 110,000+ words

The term 'mini book' was established about a decade+ ago that indicates mini or tiny books...in size.

Anyone interested in my piece on this subject can visit my page and look for:

The Growing Trend of ‘Mini Books’

I detail exactly what mini books are and traditional word counts for all book lengths.

With the growing trend of calling short stories mini books, I wonder if this is this just a new generation of writers trying to change the game...like when chicklit was meant to replace cheeky women's fiction...