content: This book is based in fact, and done so very well. I have given it only four stars as the majority of the story, such as the dialogues and day-to-day happenings, is fiction. The young reader, such as my son, may very well take that book as all fact.The author has done a great job bringing the young reader into the adventures that Lewis and Clark experienced through the use of Seaman, the dog, Her use of historical reference such as the diaries kept my the Captains and other written accounts kept by the members of the Corps of Discovery reflect the importance and difficulties of the jouney. Seaman is the comic relief in the story and keeps the young reader interested and giggling. I learned a few things by reading this book myself.As a mother and historian, I recommend this book highly for the young reader.