While the textbook itself is genuine, it turns that no, Cage didn't kick off a stock photo modeling career in Serbia to pay for more dinosaur skulls. Movie fans will recognize the poorly Photoshopped image as a scene from the Coen Brothers movie Raising Arizona. See, that's Holly Hunter standing next to them, awkwardly cut out and pasted on top of a picture of a flower bed, itself awkwardly cut out and pasted on a white void of nothingness, because every piece of Eastern European literature doubles as a text on existentialism.
So how in the hell did this happen? Not surprisingly, Cage didn't know a damn thing about it, but reportedly thought the picture looked "cute" -- referring to the baby and not his distinctly un-adorable mustache. Well, it seems that the book's designer didn't recognize Cage or Hunter and thought it was "a generic happy family shot" (if kidnapping a rich man's child and going on the lam can be called "generic happy"), and once the mistake was recognized, the book was pulled from circulation and replaced with a cover that hopefully didn't feature a collage of screenshots from The Wicker Man.