The fifth edition has been updated throughout, and includes new material on capitalization; on the connections between clear writing and clear arguments; on academic citation systems; on business writing; and on particular difficulties experienced by those whose first language is not English.
Don LePan is also the author of a study of medieval and Shakespearean literary plots as reflections of habits of thought, The Cognitive Revolution in Western Culture, and (with Doug Babington) of The Broadview Guide to Writing, third edition.