Reminiscent of the works of James Rollins, Preston and Child and Matthew Reilly, ''Ripper'' is the latest in an action-packed series about the nation's most secret agency - The Event Group. In 1887, the British Empire contracted Lawrence Ambrose to create a mutant gene to turn an ordinary person into an aggressive fighting machine. But all too quickly, Ambrose was found to be behind a streak of vicious murders, and Queen Victoria ordered the project, and Ambrose, terminated. Thus the legend of ''Jack the Ripper'' was born. The killings stopped as suddenly as they had begun - but not because Ambrose was caught. He had escaped to America. In 2012, a small cache of antiquated notebooks containing long-buried instructions is uncovered. Enter the Event Group and Col. Jack Collins, who are desperate to stop one of their most feared enemies. When the formula is loosed in the underground halls and vaults of the Event Group complex itself, brother will battle brother, and for the first time in many brave men's lives, they will understand the true meaning of fear.