Cousins Patrick and Beth are whisked away in the Imagination Station to embark on a journey around the world and through time. In the first book of the series, Voyage with the Vikings, Patrick and Beth are sent to Greenland circa AD 1000 by Mr. Whittaker. He has found a mysterious letter in the Imagination Station demanding an important Viking sunstone or trouble will be had, so he sends the cousins to look for it. They join Vikings Erik the Red and Leif Eriksson on their voyage to North America, but the adventure is just the beginning, for when they return to Mr. Whittaker's workshop with the sunstone, there is another note waiting for them. - Publisher.