Books about Promotional Products and Promotional Marketing

The Power of Promotional Products
David Blaise and Maria Carlton wrote a helpful book about the Power of Promotional Products.

Promotional Products - Strategies and Effects
Book about strategies and effects of using promotional products written by Thomas Jansson (Author), Orjan Sjoling (Author), Sverker Johnsson (Author).

How to Sell More Stuff!: Promotional Marketing That Really Works
This book is an easy read and very useful.