Canadian Flyer is an awesome book series. This one is Arctic Storm and I recently read it. It is fun,interesting and adventurous. The story goes like this, A girl named Emily first found a  magic sled behind her dresser and was left by her  Great-Aunt Miranda and sent a letter saying it's her now and while she was doing that she had a friend named Matt and they both found strange stuff inside the dresser and in this book the Arctic Storm they found a collar name "Moon Dog's collar,Yellowknife,1976". Each time they needed to the mission the magic sled said "Rub the leaf three times fast soon you will fly to the past". There are more of these books go and read it it is awesome!