The Tomorrow Paradox - The Adventures of Mackenzie Mortimer, #2

After confronting the mysterious time traveler who had been stalking him, Mac's pocket watch was destroyed. Now Mackenzie Mortimer's troubles are just beginning! Mac finds himself a stranger in a strange land, surrounded by familiar people he doesn't really know, with only Gemma, a 15-year-old clone, to guide him through the labyrinth of the future. Will the mysterious black, iron key unlock the secrets to returning him home, or is it a harbinger of his impending doom?Time is running out...
but fortunately, Mackenzie Mortimer has a few more minutes than anyone else.