Grammatically Correct - The Essential Guide to Spelling, Style, Usage, Grammar and Punctuation disscuses four main aspects of good writing:
Individual words - spelling variations, hyphenation, frequently confused homonyms, frequently misused words and phrases, irregular plurals and negatives, and uses of capitalization and type style to add special meanings
Punctuation - the role of each mark in achieving clarity and affecting tone, and demonstration of how misuses can lead to ambiguity
Syntax and structure - agreement of subject and verb, parallel construction, modifiers, tenses, pronouns, active versus passive voice, and more
Style - advice on the less hard-and-fast areas of clarity and tone, including sentence length and order, conciseness, simplification, reading level, jargon and clichés, and subtlety.
Discussions are designed to get to the heart of a concept and provide a sufficient sense of when and how to use it, along with examples that show what ambiguities or misinterpretations might result if the rules are not followed. In cases where there is more than one acceptable way to do something, the approach is not to prescribe one over another but simply to describe the options.