Clint Faraday Mysteries Book 31: Rest in Pieces Collector's Edition

Clint and Tyna are visiting in Puerto Armuelles when an obnoxious tourist grabs at Tyna. Clint tosses him out of the bar. A friend says that one's headstone will read R.I.P. - for rest in pieces. Then the obnoxious jerk is found in his boat, dead. Cut to pieces. Who? Who were the three Che Guevaras? What were they doing in Puerto Armuelles?