The story likely revolves around the character of a mercenary, someone who engages in military or combat operations for financial gain. In the context of science fiction, the novel may explore themes such as war, politics, ethics, and the nature of conflict in futuristic or speculative settings.As with many of Mack Reynolds' works, "Mercenary" may offer readers a thought-provoking exploration of social and political issues, often through the lens of speculative fiction. The protagonist's experiences as a mercenary may provide insights into the complexities of war and the moral dilemmas faced by individuals caught up in its turmoil.Overall, "Mercenary" is likely to appeal to fans of military science fiction and readers interested in thought-provoking stories that delve into the human condition and the dynamics of power and conflict.