Well, imagine no more, because a group of scientists lead by Dr. Theodore Berger - from the University of South California's Viterbi School of Engineering after a long research on rats, have created a prosthetic chip that uses electrodes to enhance and expand their memory abilities. The chip is able to store neural signals so it functions as a digital memory. Here is the Dr.Berger's explanation:
"Flip the switch on, and the rats remember. Flip it off, and the rats forget. These integrated experimental modeling studies show for the first time that with sufficient information about the neural coding of memories, a neural prosthesis capable of real-time identification and manipulation of the encoding process can restore and even enhance cognitive mnemonic processes."
I really hope these smart scientists can perfect their research, so that this chip is usable by humans, so that we can store the entire book on our brains.