Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Good reading for folks who want to know more about tube amps

Gerald's book is actually a compilation of many articles he's written over time. Don't expect long chapters, this is an easy book to pick and read an article when you've got little time on your hands.There's alot of info. on Ampeg, Fender, Marshall, and (of course) Kendricks amplifiers. If you own one of these amps you won't be sorry you bought this book.