adding a second collection

I have started to catalogue the library of one organisation I am associated with and would like to do the same for the library of another organisation, but I don't see the way to do that. What am I missing?

The best way would be to have separate (organisational) accounts for the two organisations.

>1 Adelaide.L.M.: Other than assigning each a collection, I don't think there's much you can do within a single account. Having each organization have its own collection might work since you can link them to search within that collection only.

If you mean how to create a new collection at all - in 'your books' in the top left corner there's a collections button, where you can edit collections. You can create 'organization 1' collection and use power edit to move all relevant books to that collection.