[Sirtel]

The collections column can be basically anything you want. If the name (Column heading) is Collections, the lookup name could be collections (#collections in the driver options - as it's a custom column, it needs # before its name there). I use "Shelves" for my Kobo collections, the type is comma separated text like tags, Description and Default Value are empty, as I fill in the column manually for each book (mostly based on genres, like SF, Mystery, Historical and so on). YMMV.