Fast way to separate books?

[Claire]

There's a problem with Plato: http://www.goodreads.com/book/combine...
He has written several dialogues and books offer different combinations of those but the page is very messy. For instance, look at the different editions of "Apology", there are several books out of place like Apology/Crito.
Is there a way to clean this up other than separating one by one the wrong books?

[Paula]

You can use the separate tool on the combine page. At the end of each book group is a link to the tool, you can select multiples to separate in to a new group