It is a flyer! But flyers can be so versatile. You can have a copy for people to pick up. You can mail it out with other communication, or by itself, you can email people the PDF, what else? For this client he wanted to let people know his book is for sale and a little bit about them. We actually created 5 different flyers saying the same thing, but presenting it differently so it can continue to catch peoples eyes in different ways.