To add a new edition of a book, using QuickStatements:
LAST Len "The Great Gatsby"
LAST P629 Q214371
LAST Den "The Penguin Classics edition of the book"
LAST P31 Q3331189
LAST P123 Q11281443
The first two lines need to be changed to match the book’s title and work’s Q-number respectively. Of course other metadata should probably be added too, such as date and place of publication.