EBOOK: Some people may wonder why we sell an ebook now and the original published book is discontinued. Well, the answer is to save students money and give them more flexibility on this new digital era. Once the ebook is downloaded, it can be printed and bound at any Office Depot or Kinko's facility if the student wants to. On the other hand, the student may want to print some pages or whole chapters to insert the pages within their 3-ring notebooks to go along with notes that were taking in the classroom. This ebook is good for ONE Windows or Machintosh PC. It sells for only $24.95.