PricewaterhouseCoopers has released Turning the Page: The Future of eBooks.
Here's an excerpt from the announcement:
This new study examines trends and developments in the eBooks and eReaders market in the United States, United Kingdom, the Netherlands, and Germany, and discusses major challenges and key questions for the publishing industry worldwide. It also identifies market opportunities and developments for eBooks and eReaders, and makes recommendations for publishers, traditional retailers, online retailers, and intermediaries.