The C4D version is textured and 'materialized' so you can simply exchange the simple PNG texture and get your own images on the front cover, spine or back (behind the plastic sheet). The inside is made from individual papers, and each paper can be individually manipulated if there is a need to do so. As you can see in the preview images, besides the plain papers, there are also plastic colorful separators which could be labeled too.
C4D - optimized for render
3DS/3DS MAX/OBJ - unoptimized, only exported