Barnes & Noble announced this afternoon that customers interested in buying a new NOOK Color or NOOK Simple Touch will be able to save $20 on its original retail price if they purchase them using a Mastercard card.

Starting today and running until March 18, Barnes & Noble customers can redeem the offer at its 700 US retail stores or via the BN.com website, providing another reason to look at the retailer’s e-reader range over rival Amazon Kindle devices.

The NOOK Color traditionally retails for $169, but from today it will be available for $149. The NOOK Simple Touch sees the $20 reduction take it down to $79, but only for the next three days.

To take advantage of the offer, you need to add one of the B&N devices to your basket, prepare to enter your Mastercard card details, but also to add in a coupon code. The offer is not available for the NOOK Tablet.

379003208 520x176 Barnes & Noble offers $20 price cut on NOOK e readers in Mastercard partnership

In the UK, consumers have taken to Amazon’s Kindle range. Despite some competition from the likes of Sony, Kobo and, well, Apple’s iPad, there hasn’t been a real contender for Amazon’s crown. However, that could be changing with US bookseller Barnes & Noble hosting a developer workshop in London just a day after the NOOK promotion ends in the US.

This could signal a move into the UK market from Barnes & Noble later this year, but for now the company is doing what it can to trouble Amazon domestically.