Lee Raven, boy thief, has stolen something he really didn't mean to.

Now he faces a perilous flight through London (and the murky sewers below) as he tries to escape capture - because Lee has stolen the "Book of Nebo", a book that has existed for thousands of years and tells every story and legend known to man.

It's priceless, but more than that - it's peculiar. Some will even kill to possess it. The pressure mounts and the future of Nebo is in Lee's hands - can he prevent the most dangerous ending of them all?