Sonny Software today announced the release of Bookends 10, a Mac-only full-featured bibliography/reference and information management application for professionals and students. New features in version 10 include: revamped interface with customizable views; integrated PDF, image, and text file viewer for attachments; direct Z39.50 access to online libraries; reference ratings; subject bibliographies; and much more. Bookends 10 retails for US$99 ($69 for students). Upgrades from previous versions are $29.