Audrey Powers has self-archived "E-Book Platforms for Academic Librarians."
Here's an excerpt:
The goal of this issue is to provide a succinct overview of e-book platforms for academic librarians as well as insights into where e-book platforms are headed in the future. Most of the authors work in academic libraries and their job responsibilities include developing, procuring, promoting, and educating users about e-books. The topics covered include an overview of e-book platforms including technical aspects and business models, lending platforms, aggregator platforms, commercial publisher platforms, and university press platforms. It is our hope that when you read these articles it will add to your knowledge base about the current and future state of e-book platforms in academic libraries.