Although the book was very good, it is marred by three things. First, the ebook has numerous typos. It appears book was scanned into PDF and then no one checked spelling or words. Second, it seems that the photos and captions were thrown into a hat and randomly pulled out. It is near impossible to match the photo to its caption. Third, the maps are way too small and cannot be enlarged. The maps are pretty much useless. It seems no one ever did a quality check of the scanned product.