I love this book. It is so old and so good. Just check out the sneaky troll faces etched into the face of the cliffs. The troll himself is quite scary as trolls should be.
And this is the version to get (or maybe the Paul Galdone version). I don't care if it's out of print! Get it used!!!
The Three Billy Goats Gruff by Janet Stevens
Ages 5 and up