The book jackets are definitely copyrighted. But if the display is incidental to the photograph, then there may be no problem. See, for example, http://www.benedict.com/batman.htm#batman for a description of Warner Brothers' allegedly infringing use of an Andrew Leicester sculpture. I'm not quite how "incidental" has been defined by the courts, and cannot really find anything in the statutes which spells it out. Perhaps someone can enlighten me here. Also best to be careful when photographing windows, since one may accidentally get some stray reflections in the glass. Those reflections might (upon computer enhancement) contain the image of the Playboy bunny logo dangling from the rear view mirror of the car parked across the street. Likewise, best to avoid photographing celestial objects (unless they are more than 37.5 = 75/2 light years away) for fear that reflections of some earthlight bearing someone's IP might be gathered.