Instruct: Classify Amazon reviews into positive or negative sentiment
Query: The American Classic Organ: a History in Letters

Well worth 34 bucks! For organ builders, organists, students, and those who are serious organ enthusiasts, this book is rich in "tech talk" between the correspondants, and the behind- the-scenes. It gets into the nitty-gritty of organ technology. There is an abundance of information about the Senator's beast at the Convention Hall. The letters allow one to get to know these builders, organists, etc. as well. I, personally, am more into the first four decades of the twentieth century as far as American organ building goes and I am pleased with my purchase of this fascinating book. I'm hoping a volume 2 is on the way!