Many collectors enjoy their philatelic journey through collecting stamps country by country. The Scott Postage Stamp Checklist series is designed to aid collectors in forming such collections. These checklists provide collectors with basic information about postage stamps listed with major numbers in the Scott Standard Postage Stamp Catalogue. The country name appears at the top of each page, and each row provides the issue date or year, the Scott number, a description and four checkboxes. The first two boxes are labeled at the top of the page as unused and used. The other two boxes are for collectors to label for other collectible options that can be written in, such as never-hinged or on cover. The first in the series of checklists features the stamps of Macao through the year 2020. Additional checklists will be offered in the future.

Keller is a regular guy. He goes to the movies, works on his stamp collection. Call him for jury duty and he serves without complaint. Then every so often he gets a phone call from White Plains that sends him flying off somewhere to kill a perfect stranger. Keller is a pro and very good at what he does. But the jobs have started to go wrong. The realization is slow coming yet, when it arrives, it is irrefutable: Someone out there is trying to hit the hit man. Keller, God help him, has found his way onto somebody else's hit list.

Popular Mechanics inspires, instructs and influences readers to help them master the modern world. Whether it’s practical DIY home-improvement tips, gadgets and digital technology, information on the newest cars or the latest breakthroughs in science -- PM is the ultimate guide to our high-tech lifestyle.