Hi, I cannot figure out how to sync pdf's that I add to iBooks so that they appear on other devices, only those ebooks bought from iTunes show on all devices. For example, I recently saved a user manual pdf for my camera on my iPhone to iBooks and expected that it would then appear on my Mac and also my iPad, but it doesn't. The only way I can get the manual on all devices is to download it onto each device separately from the internet. I have sync bookmarks etc and sync collections checked on all devices. How do I get these downloaded pdfs to sync? Thanks.