Or Shelfie? http://www.shelfie.com/
April 05, 2017 – Rakuten Kobo Inc., one of the world’s most innovative eReading companies, today announced it has acquired Shelfie, a service that was built to enable customers to get free or discounted eBook versions of books in their print libraries, and get recommendations based on print books they already own. The deal includes technology assets, IP, and the infrastructure on which the ecosystem runs; it also includes hiring Shelfie’s skilled team, which specializes in the application of big data and machine learning for book discovery.
Shelfie ceased operations this January. Kobo worked with Shelfie to offer its customers the opportunity to transfer their eBook libraries to Kobo’s platform, ensuring they would continue to have access to their digital books. Over the coming months, Kobo will work to integrate the Shelfie platform into its Android and iOS apps, enabling readers to add their print libraries to their reading history to generate ever more tailored eBook recommendations, as well as the option to get digital versions of print titles they already own.
I do think much of this could be addressed by software and legal/copyright, lending & reselling being the most straightforward albeit they would likely lock you to a single DRM-heavy system.
My pipedream is to be able to separate the price of the IP from the method of delivery so that I could say buy a physical book for $10 and for $5 get a digital copy, and vice-versa spend $10 on a digital copy and $5 for a physical print.