Reprinted from TidBITS by permission; reuse governed by Creative Commons license BY-NC-ND 3.0. TidBITS has offered years of thoughtful commentary on Apple and Internet topics. For free email subscriptions and access to the entire TidBITS archive, visit http://www.tidbits.com/ iBooks Author 2.1 Michael E. Cohen Apple's iBooks Author has been updated for Mavericks compatibility. The free upgrade to the free authoring software fixes an interesting bug that caused enhanced caption tracks to be dropped from some movies, and, as one might expect, provides 'various bug fixes and performance improvements.' In addition, with this update users can now preview Multi-Touch book projects-in-progress in the iBooks app on the Mac. The capability of previewing to a cable-connected iPad remains, and is still required to preview a book that uses vertical orientation. (Free update, 446 MB) .