Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Poor grammar guide

I have a number of stylebooks and grammar handbooks, and until recently I hadn't used this one very much. Now that I've looked up a few things in it, I'm very disappointed with its content. Many of the explanations are too short and vague, and at times I found clear errors. The most recent (and no doubt the very last) thing I looked up was the section on conjunctive adverbs. This handbook states that conjunctive adverbs are also called subordinating conjunctions, and it gave examples and explanations of subordinating conjunctions. That information is absolutely incorrect; although many of the actual words in each category overlap, conjunctive adverbs are not subordinating conjunctions. I can't imagine someone knowledgeable in English grammar making such a flagrant mistake.I wouldn't recommend this handbook to anyone. I'm sure the vast majority of its content is accurate, but there's no point in having a handbook that you can't trust.