For more than a year now, one of the worst kept secrets in the publishing world has been that Amazon shares information with publishers and authors that allegedly paints library e-book lending in a negative light. But in a message sent to library customers on August 27, Tom Mercer, senior v-p of digital products for library e-book vendor Bibliotheca, urged librarians to recognize and take that practice seriously, and to confront the challenges Amazon poses to libraries in the digital realm.