There's a mile-long word for the fear (and magic) or the number thirteen - triskaidekaphobia.

In this comic fireworks of a novel, newly orphaned Buddy Stebbins stumbles onto the 13th floor of a shabby old building and finds himself transported aboard a leaking pirate ship in a howling storm - 300 years in the past! Cast adrift, he washes up in New England where his plucky ancestor, ten-year-old Abigail, is caught up in the witchcraft mania and is about to be hanged. Firing off surprises like Roman candles from almost every page, award-winning novelist Sid Fleischman tells a many-mirrored tale of ghosts, witchcraft, razzle-dazzle treasure, and the mischief of illusion and delusion.