Despite only clocking in at around 200 pages in length, this tight thriller, about a group of five would-be assassins sent to kill Fidel Castro in the early 1960s, gives each assassin's point-of-view as they prepare for the task at hand -- each with their own individual motivations and using different methods -- as well as interspersing that with true biographical information about Castro and his rise to power. Not the pinnacle of Block's much-lauded work, but an impressive accomplishment considering he did it as work-for-hire under a pseudonym from a second-rate publisher that handed him the title, plot, and a $1,500 check and probably didn't care what the finished product looked like.