Do you ever mail a letter and wonder what happens to it after you drop it in the box? Read all about the post office and learn how letters are weighed, sorted, transported, culled, canceled, coded, binned, boxed, and sorted once again. Find out how people and machines work together to deliver the letters you send.

• Melissa & Doug Stamp and Sort Mailbox
• Delivering Your Mail: A Book About Mail Carriers (Community Workers)
• The Jolly Postman
• Seven Little Postmen (A Little Golden Book)
• A Day with a Mail Carrier (Hard Work)