This work is an exploration of the zone that lies between the known and unknown, a shadowy territory that's home to lake monsters, combusting people, teleporting frogs and man-eating trees. Taking a Fortean path between dogmatic scientists and credulous believers, the authors trace tales of wonder back to their sources, drawing from a huge archive of observations, opinions and discussions. As the third millennium begins many things are not yet known or understood about our world - as this guide shows, there are still many riddles to solve and wonders to experience.