When Mary-Kate and Ashley go to a ski resort for the winter holidays, the legend about an Abominable Snowman keeps snowballing. Could that shaggy monster be real?

Ashley and I were on a ski vacation, and we couldn't wait to hit the slopes -- until we heard the scary legend of Ski Mountain. According to the story, a monster snatched a boy right off the ski slopes! The boy was never seen again. But it was just a story. Or that's what we thought. Until our ski lift stopped mysterious in midair... And the tree outside our cabin was ripped apart... And we found giant footprints in the snow. We were on the case. Was there really a Ski Mountain monster? We were about to find out -- one way or another!

When Mary-Kate & Ashley go to a ski resort for the winter holidays, the legend about an Abominable Snowman who roams the mountain just keeps snowballing.

When the twins find giant pawprints behind the clubhouse of a dude ranch, an old ranch hand claims it is a dragon's.

"Mary-Kate and Ashley -- I dare you to go into the haunted house!" It was Halloween, and our friend Patty was trying to scare us. Ashley and I didn't believe in ghosts, so we took Patty's dare. But when we went into the haunted house -- we saw a ghost with our very own eyes! There was no time to investigate. We had another mystery on our hands. A case of robbery -- where all the suspects were our friends! But then the clues in our new case led us right back to the haunted house! Were our two mysteries turning into one?

Mary-Kate and Ashley must find a missing robot before the science fair is cancelled.

Our friend Mitch says the outdoor maze is haunted. We didn't believe him -- until we came face-to-face with a ghost! Is the ghost real? Or is someone trying to scare us away? There's only one way to find out. Mary-Kate and I have to go back into the scary maze!