I'm having some trouble while trying to render a scene; what happens is, when I render it in Cycles, everything in the picture is orange instead of its material. When I render it in Blender Render nothing shows up at all except for the sky background.
You will laugh when you see how simple this is.
You have the material for your table leg set as the render layer material override. What that does is override all your materials with that one (and because only the books have a UV map you don't see that texture expect on the books.)
Simply clear the Material Override, switch back to cycles and it will render normally. (All your materials are for cycles, so none of them will work in the internal render.)
It happened to me once, turned out to be that I accidentally assigned a material to the Render Layer, Go to the Render Layer and check it out, if there's an assigned material, remove it by clicking the X button next to it.