Bruji

The special collections (wish list and borrowed) can only exist once in each Pedia program. That menu command is for when you delete those collections and later decide you want them in the database after all.
To create a second wish list, use one of the regular collections. If you don't want the entries to be part of your library, select the collection and choose 'Exclude collection from Library' from the File menu.

Any chance of being able to create multiple special collections in a future version? I just got the new Kindle, and I'd really like one Wishlist for Kindle books, and one for dead-tree books.

Will keep the request in mind. In the meantime use an excluded collection for Kindle books, you won't get the nice star icon, but your Kindle wish list items will at least not be crowding your regular dead-tree library.

A few questions to make sure I understand correctly:

The Borrowed and Wish List special collections are, respectively, library-dependent (included) and library-independent (excluded)? Are there any potential problems with switching them to excluded/included collections instead?

How would multiple Wish List special collections differ from using regular excluded collections? What makes the Borrowed collection is special is more obvious to me.

Included collections seem similar to playlists and albums in iTunes and iPhoto, while excluded collections are sort of like separate, simultaneously available libraries (with nothing analogous in iTunes/iPhoto). That's cool.

Regular collections (the ones with the blue collection icon) are exactly like playlists in iTunes. The entries in these collections are simply references to the entries in the main Library. So for example, if you delete an entry from a regular collection, you will still find it in your Library.
The excluded collections (with the grey collection icon) are library-independent meaning that if you delete something from these collections it will be deleted from the database entirely.

You can keep your borrowed list excluded too if you prefer, just remember to always drag the entries into the Library once they have been returned. (When the borrowed list is included, you can simply delete an entry from the collection when it has been returned.)

If you have your wish list excluded, there's no difference between multiple wish lists and multiple excluded collections except for the yellow star which marks entries in the wish list collection.

Thanks for the helpful explanations, Nora.