MC is very good with ebooks but there is no documentation to help. You have to add any types you want in to the data section in the default.XML file in default resources and then create a custom resources directory and put that XML in that directory and all your mobis, lits, pdfs, docs and epubs etc can come into MC and if you have readers then click on the entry and up they come. 5 mins work etc. To bring them in to the library you just use explorer and click on Import into library. Once into MC you can sync them with your handheld etc. I have far too many books for ibooks (it dies when there are too many) so I keep the superset in MC and just keep in itunes what I need with MC the master. Perhaps I should write a wiki section. I think you will find more and more people wanting ebook functions as their libraries get larger. All the tags work on import. I copy author to album and get an author - book view etc. I also use calibre but do all tagging in MC. Some of the things I need I have to use Regex for like sorting authors to last name, first name that calibre provides built in but MC could just as easily provide some sample regexes to do just this or I can provide.
Peter Rowan