From clay tablets in the third millennium B.C. to e-books in the second millennium A.D., books have played a crucial role in preserving cultures, educating the masses, and entertaining us for thousands and thousands of years.  If you have ever read a book, you have Johannes Gutenberg to thank—with the invention of the printing press in 1440, books became widely accessible to the public.  In honor of National Book Lovers Day on Aug. 9, we put away our smartphones, pull out a good book, and simply… read.