"Webster's Dictionary of English Usage"
Merriam Webster | 1989 | ISBN: 0877790329 | siPDF | 978 pages | 30 MB
"The best usage guide by far is Merriam-Webster's Dictionary of English Usage, a thousand pages of short articles, from "a, an" to "zoom." Each entry includes comments from the so-called language experts, examples from respected writers, and a good dose of commonsense advice."