Instruct: Classify a review into positive or negative sentiment.
Query: Unspeakably awful

Probably the worst electricity and magnetism textbook ever written. We used this for an intermediate level class, and not a single concept was adequately or reasonably explained. Wording is ambiguous, explanations and problem sets are unclear, and there are countless fundamental errors, both conceptual and mathematical. This book is so bad that it makes their Mechanics text look good by comparison.