Amazon's Matchbook service gives you cheap/free Kindle copies of print books

Amazon on Tuesday launched Matchbook, a new benefit for Amazon customers that provides you with access to inexpensive (or free) Kindle versions of print-edition books you've bought through Amazon. The service is launching with 70,000 titles, and works with your back catalog of past Amazon purchases, all the way back to 1995. Matchbook-qualifying titles are available for download for $2.99 or less.

When Matchbook was first announced in September, Amazon included 10,000 titles. Now that number has swelled by a factor of seven. Amazon's signed up major publishers including HarperCollins, Macmillan, Houghton Mifflin Harcourt, Amazon Publishing, Wiley, Chronicle Books, and Marvel, along with indie publishers as well. Russ Grandinetti, Amazon's vice president of Kindle Content said in a statement that his company plans to "keep expanding rapidly" in the months ahead.

The books will work on Kindle devices or on any device equipped with the Kindle app, including Kindle apps available for iPhone, iPad and iPod touch.