March (Conspiracy 365) by Lord, Gabrielle (2010) Hardcover

On New Year's Eve, Cal is chased down the street by a staggering, sick man with a deadly warning... "They killed your father. They'll kill you. You must survive the next 365 days." Hurled into a life on the run the 15-year-old fugitive is isolated and alone. Hunted by the law and ruthless criminals, Cal must somehow uncover the truth about his father's mysterious death and a history-changing secret. Who can he turn to, who can he trust, when the whole world seems to want him dead? The clock is ticking. Any second could be his last. Callum Ormond has been warned. He has 365 days. The countdown has begun... 12 books. 12 months.