I just found a new way to sell a book: call AAA because your car is in the driveway and won’t start. When the tow truck driver arrives, sell the nice man a book.
Much to my surprise the gentleman who came to start my car was a former student of mine named Harley. Harley is one of the many good memories I have from my teaching career. As he started the car he asked how my book was coming along. Since the inventory is in the house I was able to show him a copy. Being an intelligent fellow he bought it on the spot.