Muller, Rachel Dunstan

Byron is looking forward to a weekend caving trip with his older brother Jesse, as well as Jesse's girlfriend Michelle and college roommate Cole, but Cole's odd behavior is starting to put a damper on the adventure, and when temper's fray and disaster strikes, it is up to Byron to save the day.

After a frightening experience during the summer solstice in Ireland, Mackenzie and her twin sister, Breanne, are now back home and an older woman is telling them about the Otherworld as the winter solstice draws near.

Chloe McBride begins searching for clues to solve a family mystery using the tiny key her elderly great-aunts sent her.