on Jane Friedman site:
There are a number of ingredients that make up a commercially successful novel, regardless of genre. Scenes that end with high moments that deliver a punch in the last lines. Evocative, rich sensory detail. Dynamic dialogue that accomplishes much more than conveying information … and the list goes on.
But the greatest and most understated ingredient of a commercially successful novel is microtension. And few writers understand what this is and how it can be used brilliantly in fiction.