As Book Three of the Finding Billy Battles trilogy begins it is 1914 and Billy is in Chicago with his wife, the former Baroness Katharina von Schreiber living a sedate and comfortable life after years of adventure and tragedy. That changes with a single telephone call that yanks Billy and Katharina back into a life of havoc and peril. Persuaded by a powerful old friend to go undercover for the U.S. government the two find themselves in Mexico during the height of the violent 1910-1920 revolution. There they grapple with an assortment of German spies, Mexican revolutionaries, devious political operatives, and other malefactors. Subsequently, tragedy strikes and Billy vanishes leaving family and friends to wonder what happened to him. Where is he? Is he dead or alive? What provoked his decades-long disappearance? In The Lost Years of Billy Battles, those questions are answered, and the mystery behind Billy's inexplicable disappearance is ultimately revealed.