Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Good biography; bad linguistics

The authors have a rather outdated concept of writing system in general. Instead of using the more or less standard term "logogram", they keep using the terms "pictogram" and "ideogram", which have been rejected for long in any serious linguistic discussions. As a result, I suppose their explanation of how the hieroglyphic system works is confusing for those new to it. Sloppy linguistics aside, the book is an excellent, and so far the only one in English, account of Champollion's life. I find the extracts from Champollion's letters particularly illuminating. The maps, diagrams and photos are also very thoughtful.