Writing: Grammar, Style, and Diction

The American Heritage Book of English Usage is a guide to current problems and debates in English language usage (topics include gender, science terms, e-mail, word choice, and style). <http://www.bartleby.com/64/>

Webgrammar's Free Tips, developed by Judy Vorfeld, is an online writing guide that covers such topics as common writing mistakes, style questions, and the usage of idioms. Vorfeld's monthly e-zine answers questions about grammar. <http://www.webgrammar.com/>