No writer's or editor's desk is complete without a battered, page-bent copy of the AP Stylebook . However, this not-so-easy-to-use reference of journalistic style is often not up-to-date and leaves reporters and copyeditors unsatisfied. Bill Walsh, copy chief for the Washington Post's business desk, addresses these shortcomings in Lapsing into a Comma . In an opinionated, humorous, and yes, curmudgeonly way, he shows how to apply the basic rules to...