I'm making this cheap because I can give almost no detail.  The book
may or may not be a children's book.  I started reading more adult
level books early.  The only thing I remember is this: the
protagonist(s) had to go through a maze/labyrinth.  This maze was
actually created from the fingerprint of a bad person, possibly a
witch.  No, it is NOT the movie Labyrinth, although if you want to see
David Bowie in spandex that's your movie.  There may or may not have
been magic crystal balls/snowglobes.  Could I make this any vaguer?  I
hope someone can help me.  :-)

Hi Danegurl,

I believe the book you are looking for is called, "The Hounds of the
Morrigan", by Pat O'Shea.

In the review that I read, from School Library Journal, they mention
this, "In one terrific touch, their fingerprint, suspended in air,
becomes elsewhere a maze to entrap the children."

You can read a few other reviews as well as the one by School Library Journal here:

http://www.amazon.com/exec/obidos/tg/detail/-/0064472051/102-5839292-9928109?v=glance&vi=reviews

I hope this helps,
Krimson

P.S. -- Labrynth is only second to The Princess Bride in my house ;)

Oh my God, I think that's it!  Thank you so so much, that's been
bugging me a ton.  *HUGS*