Almost two months after Amazon first announced it, the Kindle MatchBook service has now officially been launched in the US, letting you purchase discounted ebook equivalents of the printed editions you’ve already bought from the online retailer. To qualify for the scheme, a publisher must first greenlight their titles, and prices will range from free all the way up to $2.99. At launch, 70,000 books have been enrolled. Customers will be able to redeem purchases of books dating all the way back to 1995 – when Amazon first started selling printed editions online – and look up their entire order history to see what’s available through Kindle MatchBook. The scheme is similar to its AutoRip service, which gives shoppers MP3s for all the physical format music they’ve bought through Amazon.