Learn how I have made a very good part-time income each year for the last ten years by manufacturing and selling pens. One of the pens I make and sell is filled with invisible ink. This pen is used to effectively and safely write an owners identifying and contact information in case of theft. The market is huge. Crime is skyrocketing each year and the stolen property departments of police departments are filled with valuable property that cannot be returned to their owners because the owners cannot be identified or located. Part 1 | 
