Recommended Books to Supplement Your Reading

American Heritage Dictionary The link will bring you to information about the hardcover edition, but there's also a paper edition that's less expensive.

The Deluxe Transitive Vampire: The Ultimate Handbook of Grammar for the Innocent, the Eager, and the Doomed, by Karen Elizabeth Gordon

The New Well-Tempered Sentence: A Punctuation Handbook for the Innocent, the Eager, and the Doomed, by Karen Elizabeth Gordon

Commas Are Our Friends, by Joe Devine