Probably the easiest solution would be to create a compressed disk image and place your book folders in that disk image. If you are severely short on disk space you need to be careful, since at least until the compression has finished and possibly been verified you will not be able to delete the original files.
I thought there was a menu item in the finder to create disk images, but it appears you would need to use Disk Utility, or the command line. -- You received this message because you are subscribed to the Google Groups "MacVisionaries" group. To unsubscribe from this group and stop receiving emails from it, send an email to macvisionaries+unsubscr...@googlegroups.com. To post to this group, send email to macvisionaries@googlegroups.com. Visit this group at http://groups.google.com/group/macvisionaries. For more options, visit https://groups.google.com/d/optout.