Giving away a free informational product such as an e-book, an email series or a mini-course is a popular tactic many affiliate marketers use. Usually, your readers will have to provide their email addresses to receive the product from you. You can then use this to sell to them via email marketing. Additionally, an informational product can generate interest in the actual product you're trying to sell. If your product is popular enough and brings enough traffic to your site, you could also monetize the traffic in other ways, such as AdSense.
For the person just starting out wanting to know where to begin and would like a reference to be able to use and always go back to whenever need will find this book to be of tremendous value as it gives you the all around picture of what and how to get started in affiliate marketing, get you off the dependence of a 9 to 5 income and gives one the knowledge needed to be able to start making extra money, online, passively!