This link from Barnes & Noble is for a book titled "Apple Aperture 4" that you can pre-order now. It says it'll be available on July 4, 2012. It doesn't have an image, but the author is one John Lewell, who I assume is the same guy that wrote The Digital Photographer's Software Guide, so it could be real. I took a screenshot for reference in case Barnes & Noble takes it down.
I also found this one in amazon.co.uk, although this one seems a bit weird. Either way, it would be pretty cool if the new version of Aperture was only a few months away.