The Invisible Hand is about a boy, Sam, who has just started life at a
boarding school and finds himself able to travel back in time to
medieval Scotland. There he meets a girl, Leana, who can travel to the
future, and the two of them become wrapped up in events in /Macbeth/,
the Shakespeare play, and in the daily life of the school. The book is
the first part of a series called Shakespeare´s Moon. Each book is set
in the same boarding school but focuses on a different Shakespeare play.