Instruct: Classify the given Amazon review into positive or negative sentiment.
Query: A Jewel of a historic Atlas

What an immense and high quality work! I never saw a comparable one. There are the maps, and in the maps quotations of the diaries of the explorers. You can exactly follow the route in word and maps. And underled the reconstructed maps you can see side for side a modern map, who allows to find your way today. The size of the maps is perfect, also the clear print. Everyone, who is interested in the Lewis and Clark expedition needs this books (vol I and II edited) and for a fruitful scientific work it is simply a must.I can only say: Excellent and congratulations.