Sue Polanka, editor of the No Shelf Required blog, has taken her experiences as a librarian with Wright State University and written a book on ebooks in libraries. It's coming out this month.
Here's an excerpt from the introduction:
No Shelf Required: E-books in Libraries offers readers an opportunity to explore the challenges that e-books bring to our libraries and our businesses. It offers innovative ideas on how to integrate e-books into our libraries. It explores complicated issues with e-books in libraries and offers suggestions about how to proceed. This book is an edited work, including contributions from academic, school, and public librarians, faculty, publishers, and vendors. Readers may wish to read the entire work or select chapters. Because chapters are written to stand alone, topics may be discussed more than once, but in different contexts.