I'm distributing a bunch of in-house apps that have reference materials delivered to iBooks as in-house eBooks. I want to find a way to link the two. So far I can't get beyond a URL iBooks:// but the behaviour of that just opens the last used doc in iBooks. A side issue is that all the PDFs show on device as Untitled despite having a display name set. The author name makes it through however. At the minute my only solution is to run up another app that holds all the resources and give that a custom URL scheme.