Gamification is being used by a number of companies such as Badgeville, Bunchball, 500Friends and Rypple to addpage views, monetization and loyalty or encourage other actions inside of a company.
All you need is to add a Books to Read page to any relevant intranet, sign up to be an Amazon Associate and add a message: "To buy any of these books, click here" -- where "here" is the link to Amazon.com.