The Notetaker series pt 1

On an earth much different from ours a demon known to the world as Merricol terrorizes the land. No matter how hard humanity fights it still fails in multiple areas. He surpasses every weapon we have known, goes faster than anything that we've ever seen before, and is stronger than even the toughest human. Though this story may not seem to have a hero, many years after the war an average boy named Mike embarks on adventure with two of his classmates to find the only man who can stop Merricol: The Note Taker the only person who wields the sword of Infinity... 12 dimensions away.