Dez Limerick, a man of many skills and a murky past, faces the impossible-a skilled, deadly opponent who anticipates his every move in James Byrne's Chain Reaction. Desmond Aloysius Limerick ("Dez" to his friends and close personal enemies) is a man with a shadowy past, certain useful hard-won skills, and, if one digs deep enough, a reputation as a good man to have at your back.