A "dummy book" is just a book with no real content: for exemple, create an empty text file (in My Documents: right click, "new/Text Document"). In Calibre: click "Add book", select your empty text file, and hop! A dummy book. Of course you can then edit its metadata, to give it a title such as "Dummy book for database manipulations purposes".
About the content server: if you users access Calibre from their browser, then they should be able to see new books as they're added (well, they first have to refresh the page, of course). I just tested it here, and it works for me. So if your users can't, it's weird...
About the searches: there's three ways to do it.
1) Complete your search in the search bar: after having looked for "formats:epub", add to the search bar for your other criteria: "formats:epub and date:>2013-12-01" for example.
2) Keep the CTRL key down while you click on the tag browser items. That will chain your criteria with "OR" instead of "AND" though, so you just have to correct that in the search bar afterwards. (It'd be cool if doing CTRL+SHIFT chained with AND...)
EDIT: And of course it already can: Alter tag browser -> Search type when selecting multiple items -> Match all of the items.
3) If you have reccurring searches that often returns the same batch of books that you the want to further filter, you may want to create Virtual Libraries.
Last edited by aleyx; 12-13-2013 at 01:25 PM.
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