The action and adventure genre in fiction depicts events or a series of events that happen outside the ordinary course of the protagonist's daily life, generally accompanied by dangerous episodes and physical action. Adventure stories are quick moving, with the pace of the plot being a critical component of mood setting. Action and adventure have been common book themes since the earliest days of fiction writing. In fact, the plots of Medieval romances were comprised of a series of adventures. Action / adventure fiction often overlaps with other genres, such as: war novels, crime novels, sea stories, Robinsonades, and spy stories.