These brand-new additions to the World of Work series will open new career opportunities for curious and serious young readers concerned with what they want to do in the future. We all write and mail letters, and we have all heard tales of the neighborhood letter carrier being bitten by a dog. But what really happens once a letter slides into the mailbox? How many letter carriers actually get bitten by Fido? Finally, an up-to-date, easily accessible, and well-researched book that explains every aspect of the Postal Service -- from where to take the Postal Office exam and how unions work, to salaries and benefits and the responsibilities of a window clerk. This book will appeal to a wide range of teenagers. There's something of interest here for every reluctant reader.