Thanks to the recession and other factors in recent years, many literary agents and publishers now have a more vocal preference for novels with a high concept. High-concept work, to put it simply, is work that’s easy to pitch effectively.
To define high-concept less simply . . .
To be high-concept, a work must be: (1) highly original; (2) widely appealing; (3) easy to visualize; and (4) easy to sum up in three sentences or less while demonstrating the first three elements.
A.D. Martin 