Instruct: Classify Amazon reviews into positive or negative sentiment
Query: GERMANYS TIGER TANKS D.W to TIGER 1

For anyone with an interest in the TIGER 1 this book is an invaluable asset.The major part of the book covers the various changes in design throughout the production life of the vehicle accompanied by drawings and photographs.Anyone wishing to produce an accurate model of a particular Tiger from a particular time in its history will find the book essential.The book also contains a number of excellent scale drawings documenting the major changes in design.