Improve your professional language skills with the proven grammar instruction and supporting in-text and online resources found in Guffey/Seefer's BUSINESS ENGLISH, 13E. The ongoing leader in grammar and mechanics books, BUSINESS ENGLISH uses a three-level approach that separates topics into manageable units, helping you hone the critical skills you need to communicate professionally. Packed with insights from the authors' more than 60 years of combined classroom experience, this edition is the only text on the market that provides prompt feedback with answers and explanations so that you know immediately if you have answered correctly. Chapter review quizzes and PowerPoint (R) review slides help you strengthen your language skills to perform confidently in today's digital classroom and tomorrow's workplace.