MICHAEL C. GRUMLEY is the bestselling author of the Breakthrough and Monument series. He lives in Northern California with his two young daughters, where he's an avid reader, runner, and most of al...visualizza altroMICHAEL C. GRUMLEY is the bestselling author of the Breakthrough and Monument series. He lives in Northern California with his two young daughters, where he's an avid reader, runner, and most of all father, and dotes on his girls every chance he gets.visualizza meno