Plagiarized editions for sale in Amazon’s Kindle store show how the company is still adapting to the world of original content creation. At the same time, the stolen books may also present a test of the retailer’s ability to rely on a widely used legal shield that protects content sites from being accused of copyright infringement.

Amazon’s plagiarism problem came to light again last week after Fast Company reported that many of the bestselling self-published “authors” in the Kindle store were actually copycats who uploaded other writers’ e-books under different titles. Using the Kindle Direct Publishing platform, the copycats are able to hijack the sales of the original authors by simply copying and reselling their works.