"Category romance" refers to a specific genre of romantic fiction novels that follow a specific formula or template. These books are often short, fast-paced, and characterized by a predictable plot with a happy ending. Full definition
I have several author friends who came up through category romance, and tell some funny stories about what kinds of covers they got. (killzoneblog.com)
Agents asked if I'd considered writing category romance. (killzoneblog.com)
A romance novel is generally between 80K - 100K words, but category romance novels (Harlequin, erotica) may have stricter guidelines. (selfpublishingrelief.com)