Sweet Valley Twins Magna Edition #1: The Magic Christmas
Here, the traditional circle is replaced by a wreath. Clever move, artist person. In this book, the twins are given harlequin dolls that transport them to some other dimension/fantasy world/labyrinth type of place. It always upset us that when the twins time-traveled or whatever, no one ever said, "Hey, remember that time we visited a different world? Did that really happen?"