"add to library" on ibooks mac does not synch to ipad

I have a dot ibooks file created in ibooks Author. I have used Export to put it in a folder on my Mac (Mavericks) and then used Add to Library to put the dot ibooks file into iBooks. It appears in iBooks on the Mac and I can open it and read it. It does not automatically synch with connected ipad. I have tried putting it into a "Collection" and making sure that "Synch Collections" is checked but it still does not automatically synch. What am I doing wrong? How can I get iBooks on Mac to synch with iBooks on iPad?

thanks