Jeremy and the Magic Shelf

Jeremy didn't make a habit of traveling through time and space. But then this wasn't a usual summer. His parents gone, shuffled off to his Aunt's in a desolate town in the Southeast of England, Jeremy didn't think his life could change any more than it had.
But he was wrong.
A simple misstep and Jeremy is in a faraway place, meeting a distant ruler...and embroiled in a conspiracy. Only his wits and a friend can help him return.