A book protection apparatus and method are provided, that include a pair of substantially right angled sheets configured in a parallel fashion, the sheets being joined by a joining mechanism having a tension setting mechanism configured between the pair of sheets, to enable forcibly coupling the binding device to a coupled corner of a book. The CCU architecture includes a cache data control unit to access data between a cache memory and a CPU, a tag compare unit to compare an address sent by the CPU and a tag address sent by a tag memory and thus produce a cache hit signal, and a CCU state machine to control the data access direction of the cache data control and produce corresponding operations according to the tag compare result. If the anticipated attenuation of any of the communication links is greater than the link budget, the method may include further improving the network by changing the coupling conductor or employing lower through loss couplers for select devices.