Since 1984, "Executive Guide to Grammar" has been the standard English usage training manual of large corporations and government agencies; it is the most widely used book of its kind in the English-speaking world. If you have ever taken or considered taking an adult education class on any subject, or attended a professional seminar or workshop, you have probably "It will be worth the effort if I get a few good ideas." You should get more than that out of this study program. And that's what it is -- a self-paced study program, the same one taken by hundreds of thousands of professional men and women. Yes, it contains self-quizzes (with answer keys). The objective, after all, is not just to present useful information but to help you become a more skilled user of the English language, and that takes a bit of effort -- but not much. This is NOT a definitive treatise on grammar. You can find scores of those, many excellent, in any library or bookstore. Their trouble is they cover too much; the few most important ideas are made inaccessible, buried among pages and pages of details. Important and unimportant are treated alike, and the poor reader must decide for himself or herself what's important and what's merely nice to know. In this book those things have been decided for you. You should learn more, not less, as a result. The English language is a magnificent tool, the world's language, and using it well is a fun experience.