Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Must Have for Fighter Ace and WWI Fans

The author is one of the top authorities on WWI German aces and his knowledge shows in this exceptional book, Osprey's second title on Albatros aces. Covering many of the less well-known aces, the text is well-written and highly informative. It puts the flight operations in context of the wider operational picture and has many quotes from the German aces themselves. There are a number of photos that have never been published before and many new color profiles by the excellent artist who has done all of Osprey's WWI color profiles. This book is a 'must' for anyone who enjoys Osprey's series on aces and for all enthusiasts of WWI aviation.