S.D. Livingston

Madeline and Jack's adventures steer them onto mysterious, mist-covered shores when they find themselves aboard a Viking ship-headed for a land where shape-shifting berserkers are stealing Viking gold. But Madeline and Jack soon face even greater danger. A Viking girl is determined to blame the thefts on them, and the mystery grows deeper when it seems she might be a berserker herself!With each clue they uncover, Madeline and Jack are pulled deeper into Viking legends of sea giants, magic, and shape-shifting beasts.
Will they uncover the truth behind the legends in time to escape? Or will the magic of the ancient Vikings trap them in the past forever?For readers 8 and up.