SPOILER ALERT........
This book is very well done. However, parents should be aware that at the beginning of the book there is some focus on the crew enjoying the dogs that were brought on the trip, a dog having puppies, playing games with the dogs on the ice etc., but when they run out of food for the dogs they have to shoot them all. I'm glad I read through this alone before deciding to share it with my kids. I decided this true story can wait until our kids are a little older.