Excellent -expensive- publicity idea.

Recently I've noticed a relatively new trend. I'm well aware that product placement is anything but new, the latest, obvious example was Britney Spears' video for Hold it Against Me, where she made $500k for randomly showing various products, while badly pretending to lip-sync.
Anyway I've noticed that more and more celebrities are getting pap'd showing off a book.
I think the way Kate Bosworth is holding the book is quite pretentious, almost like she wanted to show the product off..or just let us know that she's oh! so smart!

Mikhail Bulgakov’s The Master & Margarita

Another example is lovely Sandra Bullock, pictured whilst holding her sister, Gesine Bullock-Prado, new cooking book Sugar Baby (what a coincidence!)

Here some other examples:

Kim Cattrall with The Secret by Rhonda Byrne

 ...and you can see many other examples HERE

I think that if you manage to get a celebrity pap'd with your book, you're OK with your annual sales targets!