What is the author's style in The Perilous Journey of the Donner Party by Marian Calabro?

Author Marian Calabro had written several history books for children prior to this book, and she has a special interest in American history and biography. As the book is intended for young readers, Calabro writes with simple sentences and vocabulary. There also seems to be an effort to spare the young reader some of the more grisly details about the extreme hunger and eventual cannibalism of the Donner Party, though Calabro certainly does not shy away from addressing the issue of cannibalism head on.