Arctic Storm — Frieda Wishinsky

Since discovering the Canadian Flyer, a magical time-traveling sled, in Emily's attic, Matt and Emily have outrun dinosaurs in the Alberta badlands, seen the Silver Dart soar high in Nova Scotia's skies, and evaded slave catchers on the Underground Railroad. In Arctic Storm Emily and Matt find themselves stranded in the Far North in 1976 Â -- and a squall is on the way!

After a shaky landing on snow-covered ground, the two friends meet a team of research scientists studying animal migration and habitat. Problem is, the scientists are traveling without their guide, they've lost their radio and half their supplies (including food and a stove), and now a storm is coming.

To make matters worse, one of the scientists has brought along his fifteen-year-old son, Arthur, who is becoming increasingly ill and is in need of a doctor. And after the group is spooked in the night by howling wolves, they wake up the next day to find their lead sled dog missing! Can Matt and Emily brave the storm and help their new friends  -- especially Arthur  -- back to safety? And will their faith in Moon Dog, an inexperienced sled dog, help him guide the team to safety?