I'm afraid not. Apple sent out a warning to all people who ordered Aperture books last month, that the Print Services for Apple Print products will be stopped for Aperture and iPhoto at the end of March.
But try to order and tell us the result, please. Then we will know for certain, if it is over now.
You can always export the book project as a new Aperture Library and open this library in Photos for Mac and recreate the book in Photos. Only, Photos for Mac has different book themes and Photos does not support custom layouts for books. It is much more limited.