Note what the two women in the photo below brought as beach reading material:
If this is Photoshoppery, the artist has done a very good job on not one, but three photos. This one is the safe-for-work pic (here's the Flickr page on which it appears). There are two topless, not-safe-for-work ones here and here.
Perhaps it's fake, but for the sake of computer science in general, I want to believe!


and her friend's book is the "Sundowners" by Lesly Lokko from 2004. It looks like she has the trade paperback edition with the cover removed.
So there isn't the obvious problem of the photo date being too early for the book publishing date. Looking at the shadows it looks like the photos were taken relatively close together..
I can see two friends discussing the intersection UNIX and a novel of friendship.