Although Sacajawea was an important member of the Lewis and Clark expedition, not too much is known about her life. The documents with details about her and her life are written by others. So although they can tell you things she did, her reactions to different situations, without any accounts from Sacajawea herself, no one will ever truly know what Sacajawea thought.
The book has the chapters switching from the perspective of Sacajawea and William Clark. I think that Joseph Bruchac did well with the details there are about Sacajawea and gave her a very strong voice in this book. My favorite chapters are those of Sacajawea's perspective. If the book was just from Sacajawea's perspective, I would probably give it 5 stars. But I can understand why Joseph Bruchac chose to alternating points of view, since much of the information of Sacajawea and the expedition comes from the journals of William Clark and others.
This was a good book and I really like the author's note at the end.