In some parts of the developed world, romance accounts for nearly half of all fiction titles purchased.
And while there is clearly a place for the genre, which can be enjoyable and fun, this rose-tinted view of relationships is not necessarily doing women any favours, argues Ms Quilliam.
"I would argue that a huge number of the issues we see in our clinics and therapy rooms are influenced by romantic fiction," she writes. "What we see ... is more likely to be influenced by Mills and Boon than by the Family Planning Association."
The genre has come a long way in terms of depicting a more realistic view of the world, says Ms Quilliam, "still a deep strand of escapism, perfectionism and idealisation runs through the genre," she writes.